What is the output of this C++ program? #include <iostream> using namespace…

What is the output of this C++ program?

#include <iostream>
using namespace std;

void square(int *x)
{
   *x = (*x)++ * (*x);
}

void square(int *x, int *y)
{
   *x = (*x) * --(*y);
}

int main()
{
   int number = 30;
   square(&number, &number);
   cout << number;
   return 0;
}