| 3 | using namespace std; |
| 4 | |
| 5 | int gcd(int x, int y) |
| 6 | { |
| 7 | if (x == 0 || y == 0) |
| 8 | return y, x; // will input non-zero number when even one number input in zero |
| 9 | if (x == y) |
| 10 | return x; // will return first number when both of the numbers are equal |
| 11 | if (x > y) |
| 12 | return gcd(x - y, y); // when first number is greater than second |
| 13 | if (y > x) |
| 14 | return gcd(x, y - x); // when second number is greater than first |
| 15 | } |
| 16 | |
| 17 | int main4() |
| 18 | { |