C语言编写一个登录系统包含用户名和密码

Question

#include<string.h>
#include<stdio.h>
struct yhxx
{
int name[5];
char password[5];

}student[5];
int i,j;
for(i=0;i<5;i++)
{
scanf("输入学生名字%d",name);
if(0<=name<=4)
scanf("请输入密码%s",password)
for(j=0;j<5;j++)
if(0<=password<=4)
printf("已成功登录:\n");
else
printf("密码错误:\n");
else
printf("用户名错误:\n")；
}
return 0;
}

Answer 1

修改如下，供参考：

#include<string.h>
#include<stdio.h>
struct yhxx
{
    char name[10];
    char password[12];

}student[5] = { {"123456","12345678"},{"852963","741852"}};

int main()
{
    int i = 0, j;
    char name[10], password[12];
    while (1)
    {
        printf("输入学生名字:");
        scanf("%s", name);
        printf("请输入密码:");
        scanf("%s", password);
        for (j = 0; j < 5; j++)
            if (strcmp(student[j].name, name) == 0 && strcmp(student[j].password, password) == 0)
            {
                printf("已成功登录:\n");
                break;
            }
        if (j >= 5)
        {
            i++;
            if (i < 3) printf("用户名或密码错误！还有%d次机会重新输入.\n", 3 - i);
            else     
                break;  
        }
        else
            break;
                
    }
    return 0;
}