请大家帮我看哈 谢谢 我用的是VC++遍的 但不能运行 怎么班?
# include"stdio.h"
main()
{
int key;
printf("***多人密码***\n\n");
printf("请输入密码: ");
scanf("%d",&key);
switch(key)
{
case 123:
printf("欢迎您，何刘洋.\n\n");
break;
case 456:
printf("欢迎您，赵建强.\n\n");
break;
default:
printf(" 没有您的档案 \n 程序终止 \07\n\n");
break;
}

}

你把这个试试！我在6.0里运行的
# include<iostream.h>
# include"stdio.h"
void main()
{
int key;
printf("***多人密码***\n\n");
printf("请输入密码: ");
scanf("%d",&key);
switch(key)
{
case 123:
printf("欢迎您，何刘洋.\n\n");
break;
case 456:
printf("欢迎您，赵建强.\n\n");
break;
default:
printf(" 没有您的档案 \n 程序终止 \07\n\n");
break;
}

}

建议不要用scanf和printf语句，取而代之为 cout和cin

# include<iostream.h>
就这原因吧,现在编程习惯性的写上````

呵呵
1L的朋友给的好象可以了啊
语法全忘了哦百学了

scanf printf跟cout cin有撒区别啊?

# include"stdio.h"
main()
{
int key;
printf("***多人密码***\n\n");
printf("请输入密码: ");
scanf("%d",&key);
switch(key)
{
case 123:
printf("欢迎您，何刘洋.\n\n");
break;
case 456:
printf("欢迎您，赵建强.\n\n");
break;
default:
printf(" 没有您的档案 \n 程序终止 \07\n\n");
break;
}

}
去掉break试试

# include<iostream.h>
void main()
{
int key;
cout<<"***多人密码***\n\n";
cout<<"请输入密码: ";
cin>>key;
switch(key)
{
case 123:
cout<<"欢迎您，何刘洋.\n\n"; break;
case 456:
cout<<"欢迎您，赵建强.\n\n"; break;
default:
cout<<"没有您的档案 \n 程序终止 \07\n\n";
}

}

#include<iostream.h>
#include<stdio.h>
void main(void)
{
int key;
cout<<"***多人密码***\n\n";
cout<<"请输入密码: ";
cin>>key;
switch(key)
{
case 123:
cout<<"欢迎您，何刘洋.\n\n"; break;
case 456:
cout<<"欢迎您，赵建强.\n\n"; break;
default:
cout<<"没有您的档案 \n 程序终止 \07\n\n";
}

}

谁知道呢？