程序代码：

#include < stdio.h >
#include < string.h >
#include < stdlib.h >
void main( )
{
        char p[10];
        char password []= "119";    // 定义为这种形式也行
        char time = 0;
        while ( time <3 ){
                 printf( "Enter password:\n" );
                 scanf( "%s", p );
                 if( strcmp( p,password ) == 0 ){
                     printf( "OK,Welcome\n" );
                     break;
                 }
                 else
                     time ++;
         }
         if( time == 3 )
             printf( "Who are you ?" );
         system( "pause" );

 }