C语言编写程序,用户名为:used,密码为123

#include <stdio.h>
#include <string.h>

#define USERNAME "used"
#define USERPWD "123"

int main()
{
char usrname[32], usrpwd[32];
printf("username: ");
scanf("%s", usrname);
printf("usrpwd: ");
scanf("%s", usrpwd):

if (strcmp(usrname, USERAME) == 0 &&
strcmp(usrname, USERPWD) == 0) {
printf("Welcome!\n");
}
else {
printf("Error!\n");
}
}

#include<stdio.h>
void main()
{int a;
printf("用户名:used\n请输入密码\n");
scanf("%3d",&a);
if (a==123) printf("欢迎使用\n");
else printf("你输入错误\n");

}