One Test Case Not Passing

#1

#include<bits/stdc++.h>
using namespace std;
int main() {
int t; cin >> t;
while(t–){
string s1, s2, s; cin >> s1 >> s2;
for(int i = 0; i < s1.length(); i++){
s += (s1[i]==s2[i]?‘0’:‘1’);
}
cout << s;
}
return 0;
}

#2

hey @Shadow_Flash,you have to Change line after printing ‘s’ use endl after cout<<s and you are good to go.