I didn\'t understand how this program works. Could you please explain in a detai

Question

I didn't understand how this program works. Could you please explain in a detailed way?

#include <iostream>
using namespace std;

void f (int x, int y)
{
int a=2;
cout << x << " " << y << " " << a << endl;
if (x>a+y)
{
a++;
x++;
y++;
}
else
{
a--;
x--;
y--;
}
cout << x << " " << y << " " << a << endl;
}

int g (int y, int a)
{
cout << y << " " << a << endl;
while (a>y)
{
a-=2;
f(a,y);
}
cout << y << " " << a << endl;
return a+y;
}

int main ()
{
int a, b, x, y;
a = 5;
b = a + 1;
x = 7;
y = a + b -2;
cout << a << " " << b << " " << x << " " << y << endl;
a = g(a, b);
b = g(x, y);
cout << a << " " << b << " " << x << " " << y << endl;
return 0;
}
The answer is:
5 6 7 9
5 6
4 5 2
3 4 1
5 4
7 9
7 7 2
6 6 1
7 7
9 14 7 9

Explanation / Answer

The execution starts from main() Initially value of a=5; b=5+1 =6; x=7; y=9; cout

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