The code below output different results. Can anyone clarify me on that.

Question

#include<iostream>
using namespace std;

int main() {
int res;

for(int flag = 0; flag < 5; flag++) {
if((flag > 2) && (res > 2)) {
res += 7;
}
}

cout << res;

return 0;
}

Answer 1

In if condition your res variable is un-initilized that's why it taking default values and your if condition never be true and by using cout u printing value of res which is garbage

Answer 2

I think you need to initialize "res" variable before you apply .

Answer 3

Thanks much I get it