C语言之（for循环）模拟用户登录情景

#include  <stdio.h>
#include <windows.h>
int main ()
{
int i = 0;
char passwd[30] = {0};
for (i = 0;i < 3;i++)
{
printf ("请输入密码：>");
scanf ("%s",passwd);
if (strcmp (passwd,"123456")==0)
{
break;
}
else
{
printf ("密码错误，请重新输入！！\n");
}
}
if (i == 3)
{
printf ("登录失败，请退出程序\n");
}
else
{
printf ("登陆成功\n");
}
return 0;
}