char account[20] = "0",password[20] = "0";//存储字符串
printf("请输入用户名:\n");
scanf("%s",account);//输入字符串
NSString *translate1 = [NSString stringWithUTF8String:account];//转换账号
printf("请输入密码:\n");
scanf("%s",password);
NSString *translate2 = [NSString stringWithCString:password encoding:1];//转换密码
if ([translate1 compare:@"Frank"] == 0 && [translate2 compare:@"lanou"] == 0) {//判断账号密码是否正确
NSLog(@"登陆成功");
} else {
NSLog(@"登录失败");
}