题目描述：
代码如下：
//7-7
#include <stdio.h>
int main ( void )
{
int hour, min;
scanf( "%d:%d", &hour, &min );
if( hour >= 0 && hour < 12 )
printf( "%d:%d AM", hour, min );
else if( hour == 12 )
printf( "%d:%d PM", hour, min );
else
printf( "%d:%d PM", hour - 12, min );
return 0;
}