#include <iostream>
using namespace std;
int main() 
{
    cout << "main started";
    int a = 10, b = 0;
    cout << a/b;
    cout << "main ending";
}

The above written C++ code is not printing anything on online compiler when run on “OnlineGDB” with C++ 20 vesion.

But the same program when run on g++-14 compiler from homebrew it produces
main started0main ending

I am not getting why?