c++连续读取未知个数的数字

#include <iostream>
using namespace std;

int main() {
    int n;
    int a[];
    int i=,count=;
    while(cin>>n){
        a[i] = n;
        count++;
        i++;
        if (getchar() == '\n')  break;
    }
    for(int j=;j<count;j++){
        cout<<a[j]<<" ";
    }
}

重点是

if (getchar() == '\n')  break;