Input Numbers until End of File (EOF) C++

#include <bits/stdc++.h>
using namespace std;

void test_case() {
    string s = "";
    while(getline(cin, s)) {
        int a = (s[0] - '0');
        int b = (s[2] - '0');
        cout << a << " " << b << "\n";
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T = 1;
    //cin >> T;
    for(int tc = 1; tc <= T; tc++) {
        test_case();
    }
}