新手求助~~多个vector对象的建立

我要读入两个int型vector对象ivec1和ivec2
程序如下：
#include<iostream>
#include<vector>

using namespace std;

int main()
{
    //读入两个int型的vector对象
    int input1, input2;
    vector<int> ivec1, ivec2;

    cout << "Enter an int-type vector object:" << endl
        <<"ivec1 = "<< endl;
    while (cin >> input1)
        ivec1.push_back (input1);
    cout << endl;

    cout << "Enter another int-type vector object:" << endl
        <<"ivec2 = "<< endl;
    while (cin >> input2)
        ivec2.push_back (input2);
    cout << endl;
      
       reutrn 0;
}

可是怎么不对呢，只能读入ivec1，不能读入ivec2，直接就跳过去了。