#include <iostream>
using namespace std;
int sushu(int);
int main()
{
int a;
cout<<"请输入一个数";
cin>>a;
cout<<sushu(a)<<"是素数"<<endl;
system("pause");
return 0;
}
int sushu(int a)
{
int b=2;
for(;b<=a;b++)
{
if (a%b==0)
cout<<a<<"不是素数";
break;
}
return a;
}
