塔拉多稀有:怎样在vc++中执行

#include "stdio.h"
#include "string.h"
#include "stdlib.h"

void password(char *pass)
{ char password[20],inletter=NULL;
int i=0;
clrscr();
gotoxy(17,6);
printf("\n\t\tInput your password:");
while((i<20)&&(inletter!='\r'))
{ inletter=getch(); /*无回显输入*/
if(inletter==8)
{ if(i>0)
{password[--i]=NULL;
putchar(8); /*退格键*/
putchar(' '); /*以空格代替*/
putchar(8);
}
else putchar(7); /*没有任何字符的退格，响铃警告*/
}
else if(inletter!='\r')
{ password[i++]=inletter; /*只要不是退格和回车就接受*/
putchar('*');
}
else
{password[i]=NULL; break; /*密码输入完了，记得加个NULL到后面*/
}
}
if(strcmp(password,pass)!=0)
{clrscr();
gotoxy(17,8);
printf("\n\t\tPassword is mistake Tow seconds to exit!");
sleep(2);exit(0);
}
else {printf("\n\t\tPassword is OK! Welcome to come!"); sleep(3);
}
}

void main(void)
{char *pass="lingdlz"; /*初始密码可以改为其它的*/
password(pass); /*调用*/
}
请高手指教，万分感谢！