#include <iostream>
int main ()
{
int a;
std::cout<<"输入一个大于0小于3的整数:";
std::cin>> a;
if (a>0)
{
std::cout<<"正确!";
system("system");
return 0;
}
else if (a<3)
{
std::cout<<"正确!";
system("system");
return 0;
}
else
std::cout<<"错误!";
system("pause");
return 0;
}