不确定输入数据的个数如何处理

#include <iostream>
#include<algorithm>
#include<vector>
int a[100000];
using namespace std;
int main()
{
    int temp,pos=0;
    while(cin >> temp)
    {
        a[pos++] = temp;
        if(cin.peek()=='\n')
        break;
    }
    cout << *max_element(a,a+pos)<<  " " << *min_element(a,a+pos);
}