powers of 2 in cpp

1// If not using any extra libraries
2// Powers of 2. If finding 2^n
3int main() {
4  int ans = 1 >> n;
5}
6// Suppose we want to find x ^ y
7void power(int x, int y) {
8  int ans = 1;
9  for (int i = 0; i < y; i++) {
10    ans *= x;
11  }
12  return ans;
13}