c语言—学籍管理系统

c语言课程设计—学籍管理系统

学校的课程设计，自己完成后整理了一下。
自己用链表实现的一个较简单的学籍管理系统，都是通过一些链表以及文件的基本操作完成。

功能实现

1-录入学生信息。
2-查询学生信息。
3-修改学生信息。
4-删除学生信息。
5-显示学生信息。
6-统计信息报表。
7-读盘，存盘。
注：一些getchar()以及换行符是我为了让界面美观自己加的。

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
#include<windows.h>
#define LEN sizeof(struct _stu)typedef struct _stu
{long int id;        //学号char name[20];      //姓名char sex[10];       //性别char teacher[20];   //老师int years;          //年龄char date[20];      //入学时间float score;        //入学成绩struct _stu *next;  //指向下个结点的指针
}Stu;int count = 0;//链表长度,学生总数
char choice_s;//选择void Show();//登陆界面
void Menu();//显示主菜单
Stu *Insert(Stu *pHead);//录入
Stu *Find(Stu *pHead, int id);
void Find_sum(Stu *pHead);//查询
void print(Stu *p);//显示
void Change(Stu *pHead, int id);//修改
Stu *Delete(Stu *pHead, int id);//删除
void printAll(Stu *pHead);//显示全部学生信息(总)
void printAll_1(Stu *pHead);//显示全部学生信息(姓名升序)
void printAll_2(Stu *pHead);//显示全部学生信息(成绩降序)
void data_statistics(Stu *pHead);//数据统计,打印报表
Stu *read_file(Stu *pHead);//读盘
void DeleteLink(Stu *pHead);//销毁链表
void save_file(Stu *pHead);//存盘int main()
{SetConsoleTitle("西安邮电大学学籍管理系统");     //头文件<windows.h>int i = 0;long int id;Stu *pHead = NULL;system("color 5A");                   //头文件<windows.h>，改变程序背景及字体颜色Show();pHead = read_file(pHead);while(1){Menu();switch(choice){case '1':pHead = Insert(pHead);break;case '2':Find_sum(pHead);break;case '3':printf("\n\n");printf("\t输入要修改学生学号: ");scanf("%ld",&id);Change(pHead,id);break;case '4':printf("\n\n");printf("\t输入要删除学生学号: ");scanf("%ld",&id);pHead = Delete(pHead,id);break;case '5':printAll(pHead);break;case '6':data_statistics(pHead);break;case '7':printf("\n\n");printf("\t学生总数为:%d\n",count);printf("\n");printf("\t请按任意键继续...");break;case '0':save_file(pHead);DeleteLink(pHead); //销毁链表printf("\n\n\n");printf("\t谢谢使用!\n");exit(0);}}return 0;
}void Show()    //自己添加的登陆功能，比较简单，可以自己修改添加
{int i;char passwd[18];char *ch = "WELCOME";printf("\n\n\n");printf("\t\t\t----------------------------------------------------------\n");printf("\t\t\t|                 Welcome To The System                  |\n");printf("\t\t\t----------------------------------------------------------\n");printf("\t\t\t                  用户名登陆:");do{scanf("%s",passwd);if((strcmp(passwd,"1234567")) != 0){printf("\a");//错误警示printf("\n");printf("\t\t\t                  用户名错误,请重新输入:");fflush(stdin);}}while((strcmp(passwd,"1234567")) != 0);for(i = 1; i <= 100; i++){printf("\n\n\n\n\n\n\n\n\n");printf("\t\t\t\t\t加载:%d%%",i);Sleep(9);               //头文件<windows.h>，停顿9毫秒system("cls");         //头文件<windows.h>，清屏}printf("\n\n\n\n\n\n\n\n\n");printf("\t\t\t\t\t加载完毕");Sleep(666);system("cls");printf("\n\n\n\n\n\n\n\n\n");printf("\t\t\t\t\t");for(i = 0; i < 7; i++){printf("%c",ch[i]);Sleep(333);}printf("\n\n\n");printf("\t\t\t\t\t\t\t请按任意键继续...");
}void Menu()        //主菜单
{getch();system("cls");//清屏system("color 0D");printf("\n\n");printf("\t----------------------------------------------------------\n");printf("\t|                 欢迎使用学籍管理系统                   |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   1-录入学生信息                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   2-查询学生信息                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   3-修改学生信息                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   4-删除学生信息                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   5-显示学生信息                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   6-统计信息报表                       |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   7-学生总数(.读盘)                    |\n");printf("\t----------------------------------------------------------\n");printf("\t|                   0-退出程序(.存盘)                    |\n");printf("\t----------------------------------------------------------\n");printf("\t请选择功能(0-7): ");fflush(stdin);scanf("%c",&choice_s);if(choice_s < '0' || choice_s > '7'){printf("\t请重新选择功能(0-7): ");scanf("%c",&choice_s);}system("cls");//清屏
}Stu *Insert(Stu *pHead)        //创建链表
{Stu *pEnd;Stu *pNew,*q;pNew = (Stu *)malloc(LEN);q = pHead;pEnd = pHead;printf("\n\n");printf("\t---------------------------------------------------------\n");printf("\t|                  ***录入学生信息***                   |\n");printf("\t---------------------------------------------------------\n");printf("\t该学生的学号为: ");scanf("%ld",&pNew->id);while(pNew->id < 0){printf("\t学号不能为负,请重新输入");scanf("%ld",&pNew->id);}while(q){if(q->id == pNew->id){printf("\t学号已存在,请重新输入: ");scanf("%ld",&pNew->id);q = pHead;continue;}q = q->next;}printf("\t学生姓名: ");scanf("%s",pNew->name);printf("\t学生性别: ");scanf("%s",pNew->sex);printf("\t学生老师: ");scanf("%s",pNew->teacher);printf("\t学生年龄: ");scanf("%d",&pNew->years);while(pNew->years < 0){printf("\t年龄不能为负,请重新输入:");scanf("%d",&pNew->years);}printf("\t学生入学时间: ");scanf("%s",pNew->date);while(strlen(pNew->date) < 8){printf("\t入学日期(年/月/日),请重新输入; ");scanf("%s",pNew->date);}printf("\t学生入学成绩: ");scanf("%f",&pNew->score);while(pNew->score < 0 || pNew->score > 750){printf("\t入学成绩(0-750),请重新输入: ");scanf("%f",&pNew->score);}pNew->next = NULL;if(pHead == NULL)pHead = pNew;else{while(pEnd && pEnd->next != NULL)pEnd = pEnd->next;pEnd->next = pNew;}count++;printf("\n");printf("\t请按任意键继续...");return pHead;
}void Find_sum(Stu *pHead)  //4种查询方式
{char choice;long int id;float score;char teacher[20];Stu *p = pHead;printf("\n\n");printf("\t---------------------------------------------------------\n");printf("\t|                  ***查询学生信息***                   |\n");printf("\t---------------------------------------------------------\n");printf("\t|                     1.按学号查询                      |\n");printf("\t---------------------------------------------------------\n");printf("\t|                     2.按成绩查询                      |\n");printf("\t---------------------------------------------------------\n");printf("\t|                     3.按老师和学号查询                |\n");printf("\t---------------------------------------------------------\n");printf("\t|                     4.按老师和成绩查询                |\n");printf("\t---------------------------------------------------------\n");printf("\t|                     0.返回主菜单                      |\n");printf("\t---------------------------------------------------------\n");printf("\t请选择查询方式: ");fflush(stdin);scanf("%c",&choice);while(choice < '0' || choice > '4'){printf("\t请重新选择功能(0-4): ");fflush(stdin);scanf("%c",&choice);}switch(choice){case '1':printf("\t输入要查询学生学号: ");scanf("%ld",&id);print(Find(pHead,id));       //调用print()，Find()函数printf("\n");printf("\t请按任意键继续...");getchar();return;case '2':printf("\t输入要查询学生成绩: ");scanf("%f",&score);while(p && p->score != score) p = p->next;if(!p){printf("\t对不起,没有查询到该学生信息.\n");}else{printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t---------------------------------------------------------\n");while(p){if(p->score == score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}}printf("\n");printf("\t请按任意键继续...");getchar();return;case '3':printf("\t输入要查询老师和其学生学号: ");scanf("%s %ld",teacher,&id);while(p && strcmp(p->teacher,teacher) != 0 && p->id != id) p = p->next;if(!p){printf("\t对不起,没有查询到该信息.\n");}else{printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t---------------------------------------------------------\n");while(p){if(strcmp(p->teacher,teacher) == 0 && p->id == id){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}}printf("\n");printf("\t请按任意键继续...");getchar();return;case '4':printf("\t输入要查询老师和其学生成绩: ");scanf("%s %f",teacher,&score);while(p && strcmp(p->teacher,teacher) != 0 && p->score != score) p = p->next;if(!p){printf("\t对不起,没有查询到该信息.\n");}else{printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t---------------------------------------------------------\n");while(p){if(strcmp(p->teacher,teacher) == 0 && p->score == score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}}printf("\n");printf("\t请按任意键继续...");getchar();return;case '0':return;}
}Stu *Find(Stu *pHead, int id)
{Stu *p = pHead;while(p && p->id != id) p = p->next;return p;
}void print(Stu *p)
{if(!p){printf("\t对不起,没有查询到该学生信息.\n");}else{printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t---------------------------------------------------------\n");getchar();printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);}
}void Change(Stu *pHead, int id)
{Stu *pNew = Find(pHead,id);       调用Find()函数Stu *q = pHead;char choice;int num;int flag = 0;if(pNew){printf("\n\n");printf("\t---------------------------------------------------------\n");printf("\t|                  ***修改学生信息***                   |\n");printf("\t---------------------------------------------------------\n");printf("\t该学生信息如下: \n");printf("\t---------------------------------------------------------\n");print(pNew);          //调用print()函数printf("\t---------------------------------------------------------\n");printf("\t1.学号\t2.姓名3.性别\t4.老师\t5.年龄\n");printf("\t6.入学时间\t7.入学成绩\t8.全部修改\t0.返回主菜单\n");printf("\t请选择修改类型: ");fflush(stdin);scanf("%c",&choice);while(choice < '0' || choice > '8'){printf("\t请重新选择功能(0-8): ");fflush(stdin);scanf("%c",&choice);}switch(choice){case '1':printf("\t请输入新的学号: ");scanf("%ld",&pNew->id);while(pNew->id < 0){printf("\t学号不能为负,请重新输入: ");scanf("%ld",&pNew->id);}num = pNew->id;while(q){if(q->id == num)flag++;q = q->next;}if(flag > 1){printf("\t学号已存在,请重新选择!\n");    //学号已存在，直接返回主菜单printf("\n");printf("\t请按任意键继续...");return;}printf("\n");printf("\t请按任意键继续...");getchar();return;case '2':printf("\t请输入新的学生姓名: ");scanf("%s",pNew->name);printf("\n");printf("\t请按任意键继续...");getchar();return;case '3':printf("\t请输入新的学生性别: ");scanf("%s",pNew->sex);printf("\n");printf("\t请按任意键继续...");getchar();return;case '4':printf("\t请输入新的学生老师: ");scanf("%s",pNew->teacher);printf("\n");printf("\t请按任意键继续...");getchar();return;case '5':printf("\t请输入新的学生年龄: ");scanf("%d",&pNew->years);while(pNew->years < 0){printf("\t年龄不能为负,请重新输入:");scanf("%d",&pNew->years);}printf("\n");printf("\t请按任意键继续...");getchar();return;case '6':printf("\t请输入新的入学时间: ");scanf("%s",pNew->date);while(strlen(pNew->date) < 8){printf("\t入学日期(年/月/日),请重新输入; ");scanf("%s",pNew->date);}printf("\n");printf("\t请按任意键继续...");getchar();return;case '7':printf("\t请输入新的入学成绩: ");scanf("%f",&pNew->score);while(pNew->score < 0 || pNew->score > 750){printf("\t入学成绩(0-750),请重新输入: ");scanf("%f",&pNew->score);}printf("\n");printf("\t请按任意键继续...");getchar();return;case '8':printf("\t学号: ");scanf("%ld",&pNew->id);while(pNew->id < 0){printf("\t学号不能为负,请重新输入: ");scanf("%ld",&pNew->id);}num = pNew->id;while(q){if(q->id == num)flag++;q = q->next;}if(flag > 1){printf("\t学号已存在,请重新选择!");printf("\n");printf("\t请按任意键继续...");return;}printf("\t学生名称: ");scanf("%s",pNew->name);printf("\t学生性别: ");scanf("%s",pNew->sex);printf("\t老师: ");scanf("%s",pNew->teacher);printf("\t年龄: ");scanf("%d",&pNew->years);while(pNew->years < 0){printf("\t年龄不能为负,请重新输入:");scanf("%d",&pNew->years);}printf("\t入学时间: ");scanf("%s",pNew->date);while(strlen(pNew->date) < 8){printf("\t入学日期(年/月/日),请重新输入; ");scanf("%s",pNew->date);}printf("\t入学成绩: ");scanf("%f",&pNew->score);while(pNew->score < 0 || pNew->score > 750){printf("\t入学成绩(0-750),请重新输入: ");scanf("%f",&pNew->score);}printf("\n");printf("\t请按任意键继续...");getchar();return;case '0':printf("\n");printf("\t请按任意键继续...");return;}}else{printf("\t对不起,没有查询到该学生信息.\n");printf("\n");printf("\t请按任意键继续...");getchar();}
}Stu *Delete(Stu *pHead, int id)
{Stu *pNew = Find(pHead,id);       //调用Find()函数Stu *pTemp,*q;char ch;pTemp = pHead;q = pTemp;if(pTemp == NULL){printf("\t暂无学生信息,请先添加!");printf("\n");printf("\t请按任意键继续...");getchar();return pHead;}if(pNew){print(pNew);printf("\t是否删除(y/n): ");scanf("%c",&ch);count--;switch(ch){case 'y':while(pTemp){if(pTemp->id == id){if(pHead == pTemp)    //特殊情况，删除头节点{pHead = pTemp->next;printf("\n");printf("\t请按任意键继续...");return pHead;}q->next = pTemp->next;free(pTemp);printf("\n");printf("\t请按任意键继续...");return pHead;}q = pTemp;pTemp = pTemp->next;}case 'n':return pHead;}}else{printf("\t对不起,没有查询到该学生信息.\n");printf("\n");printf("\t请按任意键继续...");getchar();return pHead;}
}void printAll(Stu *pHead)      //3种显示方式，通过冒泡排序
{char choice;Stu *pNew = pHead;printf("\n\n");printf("\t---------------------------------------------------------\n");printf("\t|                  ***显示学生信息***                   |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   1.按学号升序显示                    |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   2.按姓名升序显示                    |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   3.按成绩降序显示                    |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   0.返回主菜单                        |\n");printf("\t---------------------------------------------------------\n");printf("\t请选择显示方式: ");fflush(stdin);scanf("%c",&choice);while(choice < '0' || choice > '3'){printf("\t请重新选择功能(0-3): ");fflush(stdin);scanf("%c",&choice);}switch(choice){case '1':if(pNew == NULL){printf("\t对不起,无学生信息!\n");}else{   //冒泡排序Stu *p = NULL;Stu *q = NULL;Stu *r = NULL;Stu n;for(p = pHead; p; p = p->next){for(q = p->next; q; q = q->next){if(p->id > q->id){n = *p;*p = *q;*q = n;r = p->next;p->next = q->next;q->next = r;}}}printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(pNew){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",pNew->id,pNew->name,pNew->sex,pNew->teacher,pNew->years,pNew->date,pNew->score);pNew = pNew->next;}}printf("\n");printf("\t请按任意键继续...");getchar();return;case '2':printAll_1(pHead);printf("\n");printf("\t请按任意键继续...");getchar();return;case '3':printAll_2(pHead);printf("\n");printf("\t请按任意键继续...");getchar();return;case '0':return;}
}void printAll_1(Stu *pHead)
{Stu *pNew = pHead;if(pNew == NULL){printf("\t对不起,无学生信息!\n");}else{Stu *p = NULL;Stu *q = NULL;Stu *r = NULL;Stu n;for(p = pHead; p; p = p->next){for(q = p->next; q; q = q->next){if(strcmp(p->name,q->name) > 0){n = *p;*p = *q;*q = n;r = p->next;p->next = q->next;q->next = r;}}}printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(pNew){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",pNew->id,pNew->name,pNew->sex,pNew->teacher,pNew->years,pNew->date,pNew->score);pNew = pNew->next;}}
}void printAll_2(Stu *pHead)
{Stu *pNew = pHead;if(pNew == NULL){printf("\t对不起,无学生信息!\n");}else{Stu *p = NULL;Stu *q = NULL;Stu *r = NULL;Stu n;for(p = pHead; p; p = p->next){for(q = p->next; q; q = q->next){if(p->score < q->score){n = *p;*p = *q;*q = n;r = p->next;p->next = q->next;q->next = r;}}}printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(pNew){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",pNew->id,pNew->name,pNew->sex,pNew->teacher,pNew->years,pNew->date,pNew->score);pNew = pNew->next;}}
}void data_statistics(Stu *pHead)       //3种打印方式，通过多遍遍历链表
{char choice;float score;Stu *p,*q,*a,*b;p = q = a = b = pHead;printf("\n\n");printf("\t---------------------------------------------------------\n");printf("\t|                  ***统计信息报表***                   |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   1.分性别打印报表                    |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   2.分成绩打印报表                    |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   3.分性别和成绩打印报表              |\n");printf("\t---------------------------------------------------------\n");printf("\t|                   0.返回主菜单                        |\n");printf("\t---------------------------------------------------------\n");printf("\t请选择显示方式: ");fflush(stdin);scanf("%c",&choice);while(choice < '0' || choice > '3'){printf("\t请重新选择功能(0-3): ");fflush(stdin);scanf("%c",&choice);}switch(choice){case '1':printf("\t男: \n");printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(p){if(strcmp(p->sex,"男") == 0){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}printf("\n");printf("\t女: \n");printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(q){if(strcmp(q->sex,"女") == 0){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",q->id,q->name,q->sex,q->teacher,q->years,q->date,q->score);q = q->next;}elseq = q->next;}printf("\n");printf("\t请按任意键继续...");getchar();return;case '2':printf("\t你想要以多少分为分界线: ");scanf("%f",&score);printf("\t%.1f分以下: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(p){if(p->score < score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}printf("\n");printf("\t%.1f分及以上: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(q){if(q->score >= score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",q->id,q->name,q->sex,q->teacher,q->years,q->date,q->score);q = q->next;}elseq = q->next;}printf("\n");printf("\t请按任意键继续...");getchar();return;case '3':printf("\t你想要以多少分为分界线: ");scanf("%f",&score);printf("\t%.1f分及以上男生: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(a){if(strcmp(a->sex,"男") == 0 && a->score >= score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",a->id,a->name,a->sex,a->teacher,a->years,a->date,a->score);a = a->next;}elsea = a->next;}printf("\n");printf("\t%.1f分及以上女生: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(b){if(strcmp(b->sex,"女") == 0 && b->score >= score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",b->id,b->name,b->sex,b->teacher,b->years,b->date,b->score);b = b->next;}elseb = b->next;}printf("\n");printf("\t%.1f分以下男生: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(p){if(strcmp(p->sex,"男") == 0 && p->score < score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);p = p->next;}elsep = p->next;}printf("\n");printf("\t%.1f分以下女生: \n",score);printf("\t学号\t姓名\t性别\t老师\t年龄\t入学时间\t入学成绩\n");printf("\t-------------------------------------------------------------\n");while(q){if(strcmp(q->sex,"女") == 0 && q->score < score){printf("\t%ld\t%s\t%s\t%s\t%d\t%s\t%.1f\n",q->id,q->name,q->sex,q->teacher,q->years,q->date,q->score);q = q->next;}elseq = q->next;}printf("\n");printf("\t请按任意键继续...");getchar();return;case '0':return;}
}void DeleteLink(Stu *pHead)        //销毁链表
{Stu *q = pHead;if(pHead == NULL)return;while(pHead){q = pHead->next;free(pHead);pHead = q;}pHead = NULL;
}Stu *read_file(Stu *pHead)     //读盘，直接连接到链表
{FILE *fp;Stu *pEnd,*pNew;fp = fopen("d:\\code\\student.txt","r");     //文件名自己设置if(fp == NULL){printf("\t打开失败,按任意键退出!");getchar();}pNew = (Stu *)malloc(LEN); //分配内存while(fscanf(fp,"%ld %s %s %s %d %s %f",&pNew->id,pNew->name,pNew->sex,pNew->teacher,&pNew->years,pNew->date,&pNew->score) != EOF){count++; //记录pNew->next = NULL;if(pHead == NULL)pHead = pNew;else{pEnd = pHead;while(pEnd && pEnd->next != NULL)pEnd = pEnd->next;pEnd->next = pNew;}pNew = (Stu *)malloc(LEN); //再次分配内存}free(pNew);    //最后一次分配内存是没有用到的，要释放掉fclose(fp);getchar();return pHead;
}void save_file(Stu *pHead)     //存盘
{FILE *fp;Stu *p = pHead;fp = fopen("d:\\code\\student.txt","w");     //文件名自己设置if(fp == NULL){printf("\t打开失败,按任意键退出!");getchar();}if(p == NULL)getch();else{while(p){fprintf(fp,"%ld %s %s %s %d %s %.1f",p->id,p->name,p->sex,p->teacher,p->years,p->date,p->score);fprintf(fp,"\n");p = p->next;}printf("\n\n");printf("\t存盘成功!");}fclose(fp);
}

!@#$%^&*~

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