What is the Function call, functions prototype, and the function definition of t

Question

What is the Function call, functions prototype, and the function definition of the following program? Are the vairables being passed by value or passed by reference- identify each.

#include <iostream>
using namespace std;
int x;
void mickey(int&, int);
void minnie(int, int&);
int main ()
{
int first;
int second = 5;
x = 6;
mickey (first, second);
cout << first << " " << second << " " << x << endl;
minnie (first, second);
cout << first << " " << second << " " << x << endl;
system ("pause");
return 0;
}
void mickey (int& a, int b)

{
int first;
first = b + 12;
a = 2 * b;
b = first + 4;

}
void minnie (int u, int& v)
{
int second;
second = x;
v = second;
x = u + v;
}

Explanation / Answer

// Function call

mickey (first, second);

minnie (first, second);

// Function prototype

void mickey(int&, int);

void minnie(int, int&);

// Function Definition

void mickey (int& a, int b)
{
int first;
first = b + 12;
a = 2 * b;
b = first + 4;
}

void minnie (int u, int& v)
{
int second;
second = x;
v = second;
x = u + v;
}

// For mickey first is being passed by reference (ie &) and second by value

// For minnie second is passed by reference and first by value

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