In the program, can you explain why y = 108 when compiled please?: #include<iost

Question

In the program, can you explain why y = 108 when compiled please?:

#include<iostream>
#include<cmath>
using namespace std;

double Times2(double);
double Times3(double);
int main(void)
{double x = 4.0, y = 6.0,z;
z = Times2(x);
x = Times3(x);
y = Times3(Times2(x)+Times2(y));
cout<<"x= "<<x<<endl;
cout<<"y= "<<y<<endl;
cout<<"z= "<<z<<endl;
return 0;
}
double Times2(double x)
{double y = 2*x;
return y;
}
double Times3(double y)
{double x = 3*y;
return x;
}

Explanation / Answer

Explanation:

We can see here y = Times3(Times2(x)+Times2(y));

so first we need to look at what is the value of x here

we have initially x = 4.0

then x = Times3(x);

Times3(x) returns the value x = 3*4 = 12

So, value of x is 12.0

Now we have inital value of y as 6.0

so, y = Times3(Times2(x)+Times2(y)); will be evaluated as:

Times2(x) where x = 12.0 will return value 24

Times2(y) where y = 6.0 will return value 12

so, the parameter value passed in Times3( ) will be 36 i.e.(Times2(x)+Times2(y)) = (24 +12)

So, y = Times3(36) will return value 108

Hence final value of y is 108

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