mirror of
https://github.com/yv1ing/Student-Information-Management-System.git
synced 2025-09-16 14:44:46 +08:00
848 lines
31 KiB
C
848 lines
31 KiB
C
#include "../heads/for_function_module.h"
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#include "../heads/secondary_menu.h"
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#include "stdio.h"
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#include "windows.h"
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void statistic_module(){
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float chinese_av();
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float math_av();
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float english_av();
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continue_statistic:
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//成绩统计菜单界面
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system("cls");
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fflush(stdin);
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printf("------------------------------学生信息管理系统------------------------------\n");
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printf("->当前位置：学生成绩统计\n\n");
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printf("->1、语文成绩统计\n");
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printf("->2、数学成绩统计\n");
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printf("->3、英语成绩统计\n");
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printf("->4、返回上级菜单\n");
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//把学生信息读入内存
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FILE *fp=fopen("../stu_info/stu_info.txt","r");
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struct stu *head,*p,*q,*t,*r;
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head=(struct stu *) malloc(sizeof(struct stu));
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head->prev=NULL;
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q=head;
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int info_num=0;
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while (!feof(fp)){
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p=(struct stu *) malloc(sizeof(struct stu));
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fscanf(fp,"%s %s %s %d %f %f %f",&p->stu_num,&p->name,&p->gender,&p->age,&p->chinese,&p->math,&p->english);
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info_num+=1;
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p->prev=q;
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q->next=p;
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q=p;
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}
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fclose(fp);
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//数据表的最后一行为空行，导致链表的最后一个节点为空
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p->prev->next=NULL;
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//记录数
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info_num=info_num-1;
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//读取用户输入，判断执行方向
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char statistic_menu_input;
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printf("\n->请输入选项（1/2/3/4）");
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fflush(stdin);
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scanf("%c",&statistic_menu_input);
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switch (statistic_menu_input) {
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//统计语文成绩
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case '1':{
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chinese_statistic:
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system("cls");
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fflush(stdin);
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printf("------------------------------学生信息管理系统------------------------------\n");
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printf("->当前位置：语文成绩统计\n\n");
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printf("->1、按升序查询\n");
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printf("->2、按降序查询\n");
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printf("->3、按分数段查询\n");
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printf("->4、返回上级菜单\n");
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//读取用户输入，判断执行方向
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char chinese_menu_input;
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printf("\n->请输入选项（1/2/3/4）");
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fflush(stdin);
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scanf("%c",&chinese_menu_input);
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switch (chinese_menu_input) {
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//按升序查询
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case '1':{
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//对链表排序
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p=head->next;
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r=p->next;
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p->next=NULL;
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p=r;
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while(p!=NULL)
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{
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r=p->next;
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q=head;
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while(q->next!=NULL&&q->next->chinese<p->chinese)
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{
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q=q->next;
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}
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p->next=q->next;
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q->next=p;
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p=r;
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}
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//输出排序后的结果
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t=head->next;
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system("cls");
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fflush(stdin);
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printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
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printf("->当前位置：学生信息查询\n\n");
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printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
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while (t!=NULL){
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printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
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t=t->next;
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}
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printf("\n");
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printf("->语文平均分为：%.2f\n\n",chinese_av());
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chinese_statistic_re1:
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//读取用户输入，判断执行方向
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printf("->是否继续查询？（y/n）");
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fflush(stdin);
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scanf("%c",&statistic_menu_input);
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switch (statistic_menu_input) {
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case 'y':{
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goto continue_statistic;
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//break;
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}
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case 'n':{
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secondary_menu();
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//break;
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}
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default:{
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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goto chinese_statistic_re1;
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//break;
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}
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}
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//break;
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}
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//按降序查询
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case '2':{
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//对链表排序
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p=head->next;
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r=p->next;
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p->next=NULL;
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p=r;
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while(p!=NULL)
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{
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r=p->next;
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q=head;
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while(q->next!=NULL&&q->next->chinese>p->chinese)
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{
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q=q->next;
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}
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p->next=q->next;
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q->next=p;
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p=r;
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}
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//输出排序后的结果
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t=head->next;
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system("cls");
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fflush(stdin);
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printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
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printf("->当前位置：学生信息查询\n\n");
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printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
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while (t!=NULL){
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printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
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t=t->next;
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}
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printf("\n");
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printf("->语文平均分为：%.2f\n\n",chinese_av());
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chinese_statistic_re2:
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//读取用户输入，判断执行方向
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printf("->是否继续查询？（y/n）");
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fflush(stdin);
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scanf("%c",&statistic_menu_input);
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switch (statistic_menu_input) {
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case 'y':{
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goto continue_statistic;
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//break;
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}
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case 'n':{
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secondary_menu();
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break;
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}
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default:{
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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goto chinese_statistic_re2;
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//break;
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}
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}
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break;
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}
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//按分数段查询
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case '3':{
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system("cls");
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fflush(stdin);
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float min,max;
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chinese_query_by_fractional_segment:
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printf("------------------------------学生信息管理系统------------------------------\n");
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printf("->当前位置：语文成绩分数段查询\n\n");
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printf("->请输入要查询的语文成绩分数段:\n");
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printf("->最低分：");
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fflush(stdin);
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scanf("%f",&min);
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printf("->最高分：");
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fflush(stdin);
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scanf("%f",&max);
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//检测用户输入的数据是否合法
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if(min>max){
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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goto chinese_query_by_fractional_segment;
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}
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else{
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q=head;
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p=head->next;
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while (p!=NULL){
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if(p->chinese<min||p->chinese>max){
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r=p;
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p=p->next;
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q->next=p;
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free(r);
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}
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else{
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p=p->next;
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q=q->next;
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}
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}
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}
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//输出排序后的结果
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t=head->next;
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system("cls");
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fflush(stdin);
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printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
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printf("->当前位置：学生信息查询\n\n");
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printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
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while (t!=NULL){
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printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
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t=t->next;
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}
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printf("\n");
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printf("->语文平均分为：%.2f\n\n",chinese_av());
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chinese_query_by_fractional_segment_re:
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//读取用户输入，判断执行方向
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printf("->是否继续查询？（y/n）");
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fflush(stdin);
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scanf("%c",&statistic_menu_input);
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switch (statistic_menu_input) {
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case 'y': {
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goto continue_statistic;
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//break;
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}
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case 'n': {
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secondary_menu();
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break;
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}
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default: {
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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goto chinese_query_by_fractional_segment_re;
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//break;
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}
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}
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break;
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}
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//返回上级菜单
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case '4':{
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goto continue_statistic;
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//break;
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}
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//输入不合法
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default:{
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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Sleep(2000);
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goto chinese_statistic;
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//break;
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}
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}
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}
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//统计数学成绩
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case '2':{
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math_statistic:
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system("cls");
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fflush(stdin);
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printf("------------------------------学生信息管理系统------------------------------\n");
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printf("->当前位置：数学成绩统计\n\n");
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printf("->1、按升序查询\n");
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printf("->2、按降序查询\n");
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printf("->3、按分数段查询\n");
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printf("->4、返回上级菜单\n");
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//读取用户输入，判断执行方向
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char math_menu_input;
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printf("\n->请输入选项（1/2/3/4）");
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fflush(stdin);
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scanf("%c",&math_menu_input);
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switch (math_menu_input) {
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//按升序查询
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case '1':{
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//对链表排序
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p=head->next;
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r=p->next;
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p->next=NULL;
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p=r;
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while(p!=NULL)
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{
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r=p->next;
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q=head;
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while(q->next!=NULL&&q->next->math<p->math)
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{
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q=q->next;
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}
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p->next=q->next;
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q->next=p;
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p=r;
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}
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//输出排序后的结果
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t=head->next;
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system("cls");
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fflush(stdin);
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printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
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printf("->当前位置：学生信息查询\n\n");
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printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
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while (t!=NULL){
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printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
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t=t->next;
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}
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printf("\n");
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printf("->数学平均分为：%.2f\n\n",math_av());
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|
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math_statistic_re1:
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//读取用户输入，判断执行方向
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printf("->是否继续查询？（y/n）");
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fflush(stdin);
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scanf("%c",&statistic_menu_input);
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switch (statistic_menu_input) {
|
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case 'y':{
|
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goto continue_statistic;
|
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//break;
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}
|
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case 'n':{
|
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secondary_menu();
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break;
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}
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default:{
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printf("输入不合法，请重新输入！\n\n");
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fflush(stdin);
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goto math_statistic_re1;
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//break;
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}
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}
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break;
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}
|
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||
|
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//按降序查询
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case '2':{
|
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//对链表排序
|
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p=head->next;
|
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r=p->next;
|
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p->next=NULL;
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p=r;
|
||
|
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while(p!=NULL)
|
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{
|
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r=p->next;
|
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q=head;
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while(q->next!=NULL&&q->next->math>p->math)
|
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{
|
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q=q->next;
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}
|
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p->next=q->next;
|
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q->next=p;
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p=r;
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}
|
||
|
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//输出排序后的结果
|
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t=head->next;
|
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system("cls");
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fflush(stdin);
|
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printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
|
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printf("->当前位置：学生信息查询\n\n");
|
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printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
|
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while (t!=NULL){
|
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printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
|
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t=t->next;
|
||
}
|
||
|
||
printf("\n");
|
||
printf("->数学平均分为：%.2f\n\n",math_av());
|
||
|
||
math_statistic_re2:
|
||
//读取用户输入，判断执行方向
|
||
printf("->是否继续查询？（y/n）");
|
||
fflush(stdin);
|
||
scanf("%c",&statistic_menu_input);
|
||
switch (statistic_menu_input) {
|
||
case 'y':{
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
case 'n':{
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto math_statistic_re2;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
|
||
//按分数段查询
|
||
case '3':{
|
||
system("cls");
|
||
fflush(stdin);
|
||
float min,max;
|
||
math_query_by_fractional_segment:
|
||
printf("------------------------------学生信息管理系统------------------------------\n");
|
||
printf("->当前位置：成绩分数段查询\n\n");
|
||
printf("->请输入要查询的数学成绩分数段:\n");
|
||
printf("->最低分：");
|
||
fflush(stdin);
|
||
scanf("%f",&min);
|
||
printf("->最高分：");
|
||
fflush(stdin);
|
||
scanf("%f",&max);
|
||
|
||
//检测用户输入的数据是否合法
|
||
if(min>max){
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto math_query_by_fractional_segment;
|
||
}
|
||
else{
|
||
q=head;
|
||
p=head->next;
|
||
while (p!=NULL){
|
||
if(p->math<min||p->math>max){
|
||
r=p;
|
||
p=p->next;
|
||
q->next=p;
|
||
free(r);
|
||
}
|
||
else{
|
||
p=p->next;
|
||
q=q->next;
|
||
}
|
||
}
|
||
}
|
||
|
||
//输出排序后的结果
|
||
t=head->next;
|
||
system("cls");
|
||
fflush(stdin);
|
||
printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
|
||
printf("->当前位置：学生信息查询\n\n");
|
||
printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
|
||
while (t!=NULL){
|
||
printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
|
||
t=t->next;
|
||
}
|
||
|
||
printf("\n");
|
||
printf("->数学平均分为：%.2f\n\n",math_av());
|
||
|
||
math_query_by_fractional_segment_re:
|
||
//读取用户输入，判断执行方向
|
||
printf("->是否继续查询？（y/n）");
|
||
fflush(stdin);
|
||
scanf("%c",&statistic_menu_input);
|
||
switch (statistic_menu_input) {
|
||
case 'y': {
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
case 'n': {
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
default: {
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto math_query_by_fractional_segment_re;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
//返回上级菜单
|
||
case '4':{
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
//输入不合法
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
Sleep(2000);
|
||
goto math_statistic;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
//统计英语成绩
|
||
case '3':{
|
||
english_statistic:
|
||
system("cls");
|
||
fflush(stdin);
|
||
printf("------------------------------学生信息管理系统------------------------------\n");
|
||
printf("->当前位置：英语成绩统计\n\n");
|
||
printf("->1、按升序查询\n");
|
||
printf("->2、按降序查询\n");
|
||
printf("->3、按分数段查询\n");
|
||
printf("->4、返回上级菜单\n");
|
||
|
||
//读取用户输入，判断执行方向
|
||
char english_menu_input;
|
||
printf("\n->请输入选项（1/2/3/4）");
|
||
fflush(stdin);
|
||
scanf("%c",&english_menu_input);
|
||
switch (english_menu_input) {
|
||
//按升序查询
|
||
case '1':{
|
||
//对链表排序
|
||
p=head->next;
|
||
r=p->next;
|
||
p->next=NULL;
|
||
p=r;
|
||
|
||
while(p!=NULL)
|
||
{
|
||
r=p->next;
|
||
q=head;
|
||
while(q->next!=NULL&&q->next->english<p->english)
|
||
{
|
||
q=q->next;
|
||
}
|
||
p->next=q->next;
|
||
q->next=p;
|
||
p=r;
|
||
}
|
||
|
||
//输出排序后的结果
|
||
t=head->next;
|
||
system("cls");
|
||
fflush(stdin);
|
||
printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
|
||
printf("->当前位置：学生信息查询\n\n");
|
||
printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
|
||
while (t!=NULL){
|
||
printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
|
||
t=t->next;
|
||
}
|
||
|
||
printf("\n");
|
||
printf("->英语平均分为：%.2f\n\n",english_av());
|
||
|
||
english_statistic_re1:
|
||
//读取用户输入，判断执行方向
|
||
printf("->是否继续查询？（y/n）");
|
||
fflush(stdin);
|
||
scanf("%c",&statistic_menu_input);
|
||
switch (statistic_menu_input) {
|
||
case 'y':{
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
case 'n':{
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto english_statistic_re1;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
|
||
//按降序查询
|
||
case '2':{
|
||
//对链表排序
|
||
p=head->next;
|
||
r=p->next;
|
||
p->next=NULL;
|
||
p=r;
|
||
|
||
while(p!=NULL)
|
||
{
|
||
r=p->next;
|
||
q=head;
|
||
while(q->next!=NULL&&q->next->english>p->english)
|
||
{
|
||
q=q->next;
|
||
}
|
||
p->next=q->next;
|
||
q->next=p;
|
||
p=r;
|
||
}
|
||
|
||
//输出排序后的结果
|
||
t=head->next;
|
||
system("cls");
|
||
fflush(stdin);
|
||
printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
|
||
printf("->当前位置：学生信息查询\n\n");
|
||
printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
|
||
while (t!=NULL){
|
||
printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
|
||
t=t->next;
|
||
}
|
||
|
||
printf("\n");
|
||
printf("->英语平均分为：%.2f\n\n",english_av());
|
||
|
||
english_statistic_re2:
|
||
//读取用户输入，判断执行方向
|
||
printf("->是否继续查询？（y/n）");
|
||
fflush(stdin);
|
||
scanf("%c",&statistic_menu_input);
|
||
switch (statistic_menu_input) {
|
||
case 'y':{
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
case 'n':{
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto english_statistic_re2;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
|
||
//按分数段查询
|
||
case '3':{
|
||
system("cls");
|
||
fflush(stdin);
|
||
float min,max;
|
||
english_query_by_fractional_segment:
|
||
printf("------------------------------学生信息管理系统------------------------------\n");
|
||
printf("->当前位置：成绩分数段查询\n\n");
|
||
printf("->请输入要查询的英语成绩分数段:\n");
|
||
printf("->最低分：");
|
||
fflush(stdin);
|
||
scanf("%f",&min);
|
||
printf("->最高分：");
|
||
fflush(stdin);
|
||
scanf("%f",&max);
|
||
|
||
//检测用户输入的数据是否合法
|
||
if(min>max){
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto english_query_by_fractional_segment;
|
||
}
|
||
else{
|
||
q=head;
|
||
p=head->next;
|
||
while (p!=NULL){
|
||
if(p->english<min||p->english>max){
|
||
r=p;
|
||
p=p->next;
|
||
q->next=p;
|
||
free(r);
|
||
}
|
||
else{
|
||
p=p->next;
|
||
q=q->next;
|
||
}
|
||
}
|
||
}
|
||
|
||
//输出排序后的结果
|
||
t=head->next;
|
||
system("cls");
|
||
fflush(stdin);
|
||
printf("-------------------------------------------------学生信息管理系统-------------------------------------------------\n");
|
||
printf("->当前位置：学生信息查询\n\n");
|
||
printf("学号 姓名 性别 年龄 语文成绩 数学成绩 英语成绩\n\n");
|
||
while (t!=NULL){
|
||
printf("%-20s %-20s %-10s %-10d %-20.2f %-20.2f %-20.2f\n",t->stu_num,t->name,t->gender,t->age,t->chinese,t->math,t->english);
|
||
t=t->next;
|
||
}
|
||
|
||
printf("\n");
|
||
printf("->英语平均分为：%.2f\n\n",english_av());
|
||
|
||
english_query_by_fractional_segment_re:
|
||
//读取用户输入，判断执行方向
|
||
printf("->是否继续查询？（y/n）");
|
||
fflush(stdin);
|
||
scanf("%c",&statistic_menu_input);
|
||
switch (statistic_menu_input) {
|
||
case 'y': {
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
case 'n': {
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
default: {
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
goto english_query_by_fractional_segment_re;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
//返回上级菜单
|
||
case '4':{
|
||
goto continue_statistic;
|
||
//break;
|
||
}
|
||
//输入不合法
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
Sleep(2000);
|
||
goto math_statistic;
|
||
//break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
//返回上级菜单
|
||
case '4':{
|
||
secondary_menu();
|
||
break;
|
||
}
|
||
//输入不合法
|
||
default:{
|
||
printf("输入不合法，请重新输入！\n\n");
|
||
fflush(stdin);
|
||
Sleep(2000);
|
||
goto continue_statistic;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
float chinese_av(){
|
||
float chinese_sum=0,chinese_av;
|
||
|
||
//把学生信息读入内存
|
||
FILE *fp=fopen("../stu_info/stu_info.txt","r");
|
||
struct stu *head,*p,*q,*t,*r;
|
||
head=(struct stu *) malloc(sizeof(struct stu));
|
||
head->prev=NULL;
|
||
q=head;
|
||
int info_num=0;
|
||
while (!feof(fp)){
|
||
p=(struct stu *) malloc(sizeof(struct stu));
|
||
fscanf(fp,"%s %s %s %d %f %f %f",&p->stu_num,&p->name,&p->gender,&p->age,&p->chinese,&p->math,&p->english);
|
||
chinese_sum+=p->chinese;
|
||
info_num+=1;
|
||
p->prev=q;
|
||
q->next=p;
|
||
q=p;
|
||
}
|
||
fclose(fp);
|
||
//数据表的最后一行为空行，导致链表的最后一个节点为空
|
||
p->prev->next=NULL;
|
||
//记录数
|
||
info_num=info_num-1;
|
||
chinese_av=chinese_sum/info_num;
|
||
return chinese_av;
|
||
}
|
||
|
||
float math_av(){
|
||
float math_sum=0,math_av;
|
||
|
||
//把学生信息读入内存
|
||
FILE *fp=fopen("../stu_info/stu_info.txt","r");
|
||
struct stu *head,*p,*q,*t,*r;
|
||
head=(struct stu *) malloc(sizeof(struct stu));
|
||
head->prev=NULL;
|
||
q=head;
|
||
int info_num=0;
|
||
while (!feof(fp)){
|
||
p=(struct stu *) malloc(sizeof(struct stu));
|
||
fscanf(fp,"%s %s %s %d %f %f %f",&p->stu_num,&p->name,&p->gender,&p->age,&p->chinese,&p->math,&p->english);
|
||
math_sum+=p->math;
|
||
info_num+=1;
|
||
p->prev=q;
|
||
q->next=p;
|
||
q=p;
|
||
}
|
||
fclose(fp);
|
||
//数据表的最后一行为空行，导致链表的最后一个节点为空
|
||
p->prev->next=NULL;
|
||
//记录数
|
||
info_num=info_num-1;
|
||
math_av=math_sum/info_num;
|
||
return math_av;
|
||
}
|
||
|
||
float english_av(){
|
||
float english_sum=0,english_av;
|
||
|
||
//把学生信息读入内存
|
||
FILE *fp=fopen("../stu_info/stu_info.txt","r");
|
||
struct stu *head,*p,*q,*t,*r;
|
||
head=(struct stu *) malloc(sizeof(struct stu));
|
||
head->prev=NULL;
|
||
q=head;
|
||
int info_num=0;
|
||
while (!feof(fp)){
|
||
p=(struct stu *) malloc(sizeof(struct stu));
|
||
fscanf(fp,"%s %s %s %d %f %f %f",&p->stu_num,&p->name,&p->gender,&p->age,&p->chinese,&p->math,&p->english);
|
||
english_sum+=p->english;
|
||
info_num+=1;
|
||
p->prev=q;
|
||
q->next=p;
|
||
q=p;
|
||
}
|
||
fclose(fp);
|
||
//数据表的最后一行为空行，导致链表的最后一个节点为空
|
||
p->prev->next=NULL;
|
||
//记录数
|
||
info_num=info_num-1;
|
||
english_av=english_sum/info_num;
|
||
return english_av;
|
||
} |