用的devc++
#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include <string.h>
struct Student
{
char id[14];
char name[10];
char age[4];
char sex[4];
char date[16];
char address[20];
char phone[12];
char email[20];
};
struct Student stu[50], ss;
void menu();
int searchID(Student stu[], int count, char* keyID);
//功能:在stu的count个元素,查找ss
//返回值:查找成功,返回ss在stu中的位置号;否则,返回 -1
int searchNAME(Student stu[], int count, char* keyNAME);
int searchPHONE(Student stu[], int count, char* keyPHONE);
int searchEMAIL(Student stu[], int count, char* keyEMAIL);
int search(Student stu[], int count, Student ss);
//正常插入,返回学生数;否则,返回-1
int add(Student stu[], int count, Student ss);
//若输入的学号存在,正常修改,返回学生数,否则,修改失败,返回 -1
int modify(Student stu[], int count, Student ss);
//若输入的学号存在,删除,返回学生数,否则,删除失败,返回 -1
int Delete(Student stu[], int count, Student ss);
void writeFile(Student stu[], int count);
int readFile(Student stu[]);
int main()
{
char keyID[20], keyNAME[10], keyPHONE[12], keyEMAIL[20];
int count = 0, i;
int select, select1, tag = 1;
count = readFile(stu);
while (tag)
{
//菜单
menu();
scanf("%d", &select);
switch (select)
{
case 1://增加
printf("请输入待录入的学生\n学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
scanf("%s %s %s %s %s %s %s %s", ss.id, ss.name, &ss.age, ss.sex, ss.date, ss.address, ss.phone, ss.email);
i = add(stu, count, ss);
//如果本来不存在这个学生信息
if (i != -1)
{
printf("录入成功\n");
count = i;
}
else
printf("录入失败\n");
break;
case 2://按学号查找
printf("请输入学号关键字:");
scanf("%s", keyID);
i = searchID(stu, count, keyID); //i = searchID(stu, count, key); 修改
if (i != -1)
{
printf("待查找的学生\n学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
}
else
printf("%s不存在!\n", keyID);
break;
case 3://按姓名查找
printf("请输入姓名关键字:");
scanf("%s", keyNAME);
i = searchNAME(stu, count, keyNAME);
if (i != -1) {
printf("待查找的学生\n学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
}
else
printf("%s不存在!\n", keyNAME);
break;
case 4:
printf("请输入电话关键字:");
scanf("%s", keyPHONE);
i = searchPHONE(stu, count, keyPHONE);
if (i != -1) {
printf("待查找的学生\n学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
}
else
printf("%s不存在!\n", keyPHONE);
break;
case 5:
printf("请输入电子邮箱关键字:");
scanf("%s", keyEMAIL);
i = searchEMAIL(stu, count, keyEMAIL);
if (i != -1) {
printf("待查找的学生\n学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
}
else
printf("%s不存在!\n", keyEMAIL);
break;
case 6://修改
printf("请输入待修改的学生\n学号");
scanf("%s", ss.id);
i = search(stu, count, ss);
if (i == -1)
printf("%s 不存在,修改失败!\n", ss.id);
else {
//printf("请选择需要修改的信息\n1.学号 2.姓名 3.年龄 4.性别 5.出生日期 6.地址 7.电话 8.电子邮箱");
i = modify(stu, count, ss);
printf("修改成功\n");
}
break;
case 7://删除
printf("请输入待删除的学生学号:");
scanf("%s", ss.id);
i = Delete(stu, count, ss);
if (i != -1)
{
printf("删除成功\n");
count = i;
}
else
printf("%s 不存在,删除失败\n", ss.id);
break;
case 8://显示
printf("学号\t姓名\t年龄\t性别\t出生年月\t地址\t电话\tE-mail\n");
for (i = 0; i < count; i++)
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
break;
case 0:
system("cls");
printf("欢迎再次使用学生信息管理系统......\n");
tag = 0;
writeFile(stu, count);
break;
default:
printf("选择错误,只能选择(0-8)");
}
printf("按任意键继续......\n");
getch();
system("cls");
}
getch();
return 0;
}
void menu()
{
printf(" *学生信息管理系统* \n");
printf("1、录入学生信息\n");
printf("2、查找学生信息(按学号)\n");
printf("3、查找学生信息(按姓名)\n");
printf("4、查找学生信息(按电话)\n");
printf("5、查找学生信息(按电子邮箱)\n");
printf("6、修改学生信息\n");
printf("7、删除学生信息\n");
printf("8、显示学生信息\n");
printf("0、退出系统\n");
printf("__________________________\n");
printf("请选择(0-8):");
}
int searchID(Student stu[], int count, char* keyID) //int searchID(Student stu[], int count, char key) 修改
{
int i;
char* p = NULL;
for (i = 0; i < count; i++) //先排查 学号
{
p = strstr(stu[i].id, keyID);
if (p) return i;
}
return -1;
}
int searchNAME(Student stu[], int count, char* keyNAME) //int searchID(Student stu[], int count, char key) 修改
{
int i;
char* p = NULL;
for (i = 0; i < count; i++) //先排查 学号
{
p = strstr(stu[i].name, keyNAME);
if (p) return i;
}
return -1;
}
int searchPHONE(Student stu[], int count, char* keyPHONE) //int searchID(Student stu[], int count, char key) 修改
{
int i;
char* p = NULL;
for (i = 0; i < count; i++) //先排查 学号
{
p = strstr(stu[i].phone, keyPHONE);
if (p) return i;
}
return -1;
}
int searchEMAIL(Student stu[], int count, char* keyEMAIL) //int searchID(Student stu[], int count, char key) 修改
{
int i;
char* p = NULL;
for (i = 0; i < count; i++) //先排查 学号
{
p = strstr(stu[i].email, keyEMAIL);
if (p) return i;
}
return -1;
}
int search(Student stu[], int count, Student ss)
{
int i;
for (i = 0; i < count; i++)
if (strcmp(stu[i].id, ss.id) == 0) return i; //if (strcmp(stu[i].name, ss.id) == 0) 修改
return -1;
}
//功能:在stu的count个元素,查找ss
//返回值:查找成功,返回ss在stu中的位置号;否则,返回 -1
int add(Student stu[], int count, Student ss)
{
//int pos;
//先判断添加的信息是否原本已有这个学生
//pos = search(stu, count, ss);
//如果本来不存在,就添加
//if (pos == -1)
//{
stu[count] = ss;
return count + 1;
//}
return -1;
}
//若输入的学号存在,正常修改,返回学生数,否则,修改失败,返回 -1
int modify(Student stu[], int count, Student ss)
{
int pos, select1;
char id[14], name[10], age[4], sex[4], date[16], address[20], phone[12], email[20];
pos = searchID(stu, count, ss.id);
if (pos == -1)
return -1;
else
{
printf("请选择需要修改的信息\n1.学号 2.姓名 3.年龄 4.性别 5.出生日期 6.地址 7.电话 8.电子邮箱\n");
scanf("%d", &select1);
switch (select1) {
case 1:
printf("请输入新的学号:");
scanf("%s", id);
strcpy(stu[pos].id, id); //stu[pos].id = id; 修改
break; //修改
case 2:
printf("请输入新的姓名:");
scanf("%s", name);
strcpy(stu[pos].name, name);//stu[pos].name = name; 修改
break; //修改
case 3:
printf("请输入新的年龄:");
scanf("%s", age);
strcpy(stu[pos].age, age); //stu[pos].age = age; 修改
break; //修改
case 4:
printf("请输入新的性别:");
scanf("%s", sex);
strcpy(stu[pos].sex, sex); //stu[pos].sex = sex; 修改
break; //修改
case 5:
printf("请输入新的生日:");
scanf("%s", date);
strcpy(stu[pos].date, date); //stu[pos].date = date; 修改
break; //修改
case 6:
printf("请输入新的地址:");
scanf("%s", address);
strcpy(stu[pos].address, address);//stu[pos].address = address; 修改
break; //修改
case 7:
printf("请输入新的电话:");
scanf("%s", phone);
strcpy(stu[pos].phone, phone); //stu[pos].phone = phone; 修改
break; //修改
case 8:
printf("请输入新的邮箱:");
scanf("%s", email);
strcpy(stu[pos].email, email); //stu[pos].email = email; 修改
break; //修改
default: break; //修改
}
return count;
}
}
//若输入的学号存在,删除,返回学生数,否则,删除失败,返回 -1
int Delete(Student stu[], int count, Student ss)
{
int pos, i;
pos = searchID(stu, count, ss.id);
if (pos == -1)
return -1;
else
{
for (i = pos + 1; i < count; i++)
stu[i - 1] = stu[i];
return count - 1;
}
}
void writeFile(Student stu[], int count)
{
FILE* fp;
int i;
//"w"是写文件
fp = fopen("student.txt", "w");
for (i = 0; i < count; i++)
//fprinf()是把文件内容输出到屏幕
fprintf(fp, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email);
fclose(fp);
}
//只读文件
int readFile(Student stu[])
{
FILE* fp;
int i;
fp = fopen("student.txt", "r");
//如果文件不存在,返回0
if (fp == NULL)
return 0;
//foef()判断文件是否结束,结束返回1,未结束返回0,用!feof()作为循环条件
//fscanf()将文件中的数据读入数组变量id,name...中
for (i = 0;; i++)
if (fscanf(fp, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s", stu[i].id, stu[i].name, &stu[i].age,
stu[i].sex, stu[i].date, stu[i].address, stu[i].phone, stu[i].email) != 8) break;
fclose(fp);
return i;
}