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;
}
else
p = 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;
}
else
p = 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;
}
else
p = 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;
}
else
p = 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;
}
else
q = 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;
}
else
p = 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;
}
else
q = 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;
}
else
a = 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;
}
else
b = 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;
}
else
p = 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;
}
else
q = 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);
}
!@#$%^&*~