#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<windows.h>
#define N 100
struct student
{
char id[10];
char name[25];
char sex[10];
int age;
char jiguan[25];
char xibie[25];
char zhuanye[25];
int ban;
}stu[N];
void menu()  
{
int choice,w1;
void add();void find();void shanchu();void change();void tongji();void read();void input();
do
{
puts("\t--------------------------------------------------------");
		puts("\t|                    欢迎使用学籍管理系统              |");
		puts("\t|------------------------------------------------------|");
		puts("\t|                    1.录入学生资料                    |");
		puts("\t|                    2.查找学生资料                    |");
		puts("\t|                    3.删除学生资料                    |");
		puts("\t|                    4.修改学生资料                    |");
		puts("\t|                    5.按学号或专业输出学生资料        |");
		puts("\t|                    6.查看所有学生资料                |");
		puts("\t|                    7.退出系统                        |");
		puts("\t--------------------------------------------------------");
		printf("想选择的功能：");

scanf("%d",&choice);
if(choice<1||choice>8)
{w1=1;system("cls");printf("菜单选择错，请重新选择！\n");}
else w1=0;
}while(w1==1);
switch (choice) 
{
case 1:        
add();
break;
case 2:
find();
break;
case 3:
shanchu();
break;
case 4:
change();
break;
case 5:
tongji();
break;
case 6:
read();
break;
case 7:
break;
default: exit(0);
}
}
int load()
{
FILE *fp;
int i;
if ((fp=fopen("results.txt","rb"))==NULL)
{
printf("文件打开错误");
return 0;
}
for (i=0;!feof(fp);i++)fread(&stu[i],sizeof(struct student),1,fp);
fclose(fp);
return(i-1);
}
void save(int n)
{
int i;
FILE *fp;
if ((fp=fopen("results.txt","wb"))==NULL)
{
printf("文件打开错误:");
}
for (i=0;i<n;i++)fwrite(&stu[i],sizeof(struct student),1,fp);
fclose(fp);
}
void read()
{
int n,m;
n=load();
printf("学号\t姓名\t性别\t年龄\t籍贯\t系别\t专业\t班级\t");
for (m=0;m<n;m++)
{
printf("\n%s",stu[m].id);
printf("\t%s",stu[m].name);
printf("\t%s",stu[m].sex);
printf("\t%d",stu[m].age);
printf("\t%s",stu[m].jiguan);
printf("\t%s",stu[m].xibie);
printf("\t%s",stu[m].zhuanye);
printf("\t%d",stu[m].ban);
}
{
int xz,choice;  
do
{
printf("\n1-返回主菜单；2-退出系统\n");
scanf("%d",&choice);
if(choice<1||choice>2)
{xz=1;system("cls");printf("输入错误，请重新选择！\n");}
else xz=0;
}while(xz==1);
switch(choice)
{
case 1:
menu(); break; 
case 2:
exit(0); break;
}
}
}
void add()
{
FILE *fp;
int i,n,m;
n=load();
if ((fp=fopen("results.txt","wb"))==NULL)
{
printf("文件打开错误!\n");
exit(1);
}
printf("你想要录入多少个学生信息?");
scanf("%d",&m);
for (i=0;i<m;i++)
{
printf("\n学号:");
scanf("%s",stu[n+i].id);
printf("姓名:");
scanf("%s",stu[n+i].name);
printf("性别:");
scanf("%s",stu[n+i].sex);
printf("年龄:");
scanf("%d",&stu[n+i].age);
printf("籍贯:");
scanf("%s",stu[n+i].jiguan);
printf("系别:");
scanf("%s",stu[n+i].xibie);
printf("专业:");
scanf("%s",stu[n+i].zhuanye);
printf("班级:");
scanf("%d",&stu[n+i].ban);
printf("输入完成");
save(n+m);
}
for (i=0;i<m;i++)fwrite(&stu[i],sizeof(struct student),1,fp);
fclose(fp);
{
int xz,choice;  
do
{
printf("\n1-返回主菜单；2-退出系统\n");
scanf("%d",&choice);
if(choice<1||choice>2)
{xz=1;system("cls");printf("输入错误，请重新选择！\n");}
else xz=0;
}while(xz==1);
switch(choice)
{
case 1:
menu(); break; 
case 2:
exit(0); break; 
}
}
}
void find()
{
int meau();
int n,i;
char m[10];
n=load();
printf("\t\t\t欢迎使用学号查找功能\n请输入你需要查找的学生的学号:");
scanf("%s",&m);
for (i=0;i<n;i++)
{ if (!strcmp(stu[i].id,m))
{
printf("学号\t姓名\t性别\t年龄\t籍贯\t系别\t专业\t班级\n");
printf("%s",stu[i].id);
printf("\t%s",stu[i].name);
printf("\t%s",stu[i].sex);
printf("\t%d",stu[i].age);
printf("\t%s",stu[i].jiguan);
printf("\t%s",stu[i].xibie);
printf("\t%s",stu[i].zhuanye);
printf("\t%d\n",stu[i].ban);
}
}
{
int xz,choice;  
do
{
printf("\n1-返回主菜单；2-退出系统\n");
scanf("%d",&choice);
if(choice<1||choice>2)
{xz=1;system("cls");printf("输入错误，请重新选择！\n");}
else xz=0;
}while(xz==1);
switch(choice)
{
case 1:
menu(); break; 
case 2:
exit(0); break; 
}
}
}
void change()
{
int n,i,j;
char m[10];
n=load();
printf("欢迎使用修改功能\n输入你要修改学生的学号:");
scanf("%s",&m);
for (i=0;i<n;i++)
{
if (!strcmp(stu[i].id,m))
{
printf("你要修改的项目：\n1)学号2)姓名3)性别4)年龄5)籍贯6)系别7)专业8)班级\n");
printf("你选择的功能是:");
scanf("%d",&j);
switch (j)
{
case 1:
printf("输入你修改后的学号:");
scanf("%s",stu[i].id);
break;
case 2:
printf("输入你修改后的姓名:");
scanf("%s",stu[i].name);
break;
case 3:
printf("输入你修改后的性别:");
scanf("%s",stu[i].sex);
break;
case 4:
printf("输入你修改后的年龄:");
scanf("%d",&stu[i].age);
break;
case 5:
printf("输入你修改后的籍贯:");
scanf("%s",stu[i].jiguan);
break;
case 6:
printf("输入你修改后的系别:");
scanf("%s",stu[i].xibie);
break;
case 7:
printf("输入你修改后的专业:");
scanf("%s",stu[i].zhuanye);
break;
case 8:
printf("输入你修改后的班级:");
scanf("%d",&stu[i].ban);
break;
default :
printf("选择的功能错误\n");
int getch();
change();
break;
}
save(n);
}
}
{
int xz,choice; 
do
{
printf("\n1-返回主菜单；2-退出系统\n");
scanf("%d",&choice);
if(choice<1||choice>2)
{xz=1;system("cls");printf("输入错误，请重新选择！\n");}
else xz=0;
}while(xz==1);
switch(choice)
{
case 1:
menu(); break; 
case 2:
exit(0); break;
}
}
}
void tongji_1()
{
int n,i,sum=0;
char m[10];
n=load();
printf("输入你要统计的学号:");
scanf("%s",&m);
printf("学号\t姓名\t性别\t年龄\t籍贯\t系别\t专业\t班级\n");
for (i=0;i<n;i++)
if (!strcmp(stu[i].id,m))
{
printf("%s",stu[i].id);
printf("\t%s",stu[i].name);
printf("\t%s",stu[i].sex);
printf("\t%d",stu[i].age);
printf("\t%s",stu[i].jiguan);
printf("\t%s",stu[i].xibie);
printf("\t%s",stu[i].zhuanye);
printf("\t%d\n",stu[i].ban);
sum++;
printf("%s学号的学生共有%d个\n",m,sum);}
}
void tongji_2()  
{
int n,i,sum=0;
char m[25];
n=load();
printf("输入你要统计的专业:");
scanf("%s",&m);
printf("学号\t姓名\t性别\t年龄\t籍贯\t专业\t班级\n");
for (i=0;i<n;i++)
if (!strcmp(m,stu[i].zhuanye))
{
printf("%s",stu[i].id);
printf("\t%s",stu[i].name);
printf("\t%s",stu[i].sex);
printf("\t%d",stu[i].age);
printf("\t%s",stu[i].jiguan);
printf("\t%s",stu[i].xibie);
printf("\t%s",stu[i].zhuanye);
printf("\t%d\n",stu[i].ban);
sum++;
printf("%s专业的学生共有%d个/n",m,sum);}
}
void tongji()
{
int n,m;
n=load();
printf("欢迎使用统计功能\n你想统计的项目是:1)  学号\t2)  专业\n");
printf("输入你想选择的功能:");
scanf("%d",&m);
switch (m)
{
case 1:
tongji_1();
break;
case 2:
tongji_2();
break;
default :
printf("选择的功能错误\n");
int getch();
tongji();
break;
}
{
int xz,choice; 
do
{
printf("\n1-返回主菜单；2-退出系统\n");
scanf("%d",&choice);
if(choice<1||choice>2)
{xz=1;system("cls");printf("输入错误，请重新选择！\n");}
else xz=0;
}while(xz==1);
switch(choice)
{
case 1:
menu(); break; 
case 2:
exit(0); break; 
}
}
}