c++代码中输入整型后按回车键输出原样

#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
    int a[100];
    int j,i=0;
    char ch;
    do
    {
        cin>>a[i];
        i++;
    }while((ch=getchar())!='\n');
    for(j=0;j<i;j++)
        cout<<a[j]<<" ";
}