#include <iostream>;
using namespace std;
//2、输入一个大于1000的int型数,将它的低4位(右四位)都置为1;
int main()
{
int a = 0; //待处理的值
cout << "inter an int greater than 1000"<<endl; //指示
bool bad = 0; //这里bad防止第一次循环输出please inter again!
do
{
if (bad == 1)
cout << "please inter again!"<<endl;
cin >> a; //这里输入不能放在if上面 不然会有小bug
bad = 1;
} while (a <= 1000);
a = (a /10000*10000) + 1111; //很合理
cout << "转换成-->" << a;
}