程序代码：

# include <stdio.h>

bool sushu(int val)
{
    int i ;
    for (i = 2; i<val; ++i)
    {
      if(0 == val%i)
     
          break;
    }
      if(i == val)
       return true;
         else
             return false;

     
}
int main (void)
{ 
     int i;
   
     for (i = 2; i<100; ++i)
     {
        
          if (sushu(i))
              printf("输出1到100素数：%d\n",i);
     }


   
   return 0;
}