Output of following C++ program? #include<iostream> using namespace std; int main() { int x = 10; int& ref = x; ref = 20; cout << "x = " << x << endl ; x = 30; cout << "ref = " << ref << endl; return 0; }
1.x = 20; ref = 30
2.x = 20; ref = 20
3.x = 10; ref = 30
4.x = 30; ref = 30
Posted Date:-2022-07-04 10:07:24