Find the output value using call by value and call by reference

Question

Given the following code: int p = 5 , q=2; int f( int b, int c){ b = 2 * c; c = 3 + p; return b + c ;} print f(p,q); print p; print q;

I have found that the output values using call by value are: f(p,q)=12 p=5 q=2

And as far as i know also the output using call by reference in this example ,gives the same values.Am I right?

Answer 1

Both by value:

{p = 5, q = 2, b = 5, c = 2}
b= 2 * c; 
{p = 5, q = 2, b = 4, c = 2} 
c= 3 + p; 
{p = 5, q = 2, b = 4, c = 8}
return b + c;
{b + c = 12}

Both by reference:

{p = b = 5, q = c = 2}
b= 2 * c; 
{p = b = 4, q = c = 2}
c= 3 + p; 
{p = b = 4, q = c = 7}
return b + c;
{b + c = 11}