#include "stdio.h"
void main()
{
int n,i;
printf("please input a number>2:");
scanf("%d",&n);
for(i=2;i<n;i++);
if(a%i==0)
break;
if(i<n)
printf("%d not a sushu\n",n);
else
printf("%d is a sushu\n",n);
}
??不能运行???
for(i=2;i<n;i++);
if(n%i==0) //打快了。按了下A
break;