Functions in C++

#include "stdafx.h"
#include <iostream>
using namespace std;
int x;
void summer(int&, int);
void fall(int, int&);
int main()
{
int intNum1 = 2;
int intNum2 = 5;
x = 6;
summer(intNum1, intNum2);
cout << intNum1 << " " << intNum2 << " " << x << endl;
fall(intNum1, intNum2);
cout << intNum1 << " " << intNum2 << " " << x << endl;
system ("pause");
return 0;
}
void summer(int& a, int b)
{
int intNum1;
intNum1 = b + 12;
a = 2 * b + 5;
b = intNum1 + 4;
}
void fall(int u, int& v)
{
int intNum2;
intNum2= x;
v = intNum2 * 4;
x = u - v;
}



#include "stdafx.h"
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
void traceMe(double x, double y);
int main()
{
double one, two;
cout << "Enter two numbers: ";
cin >> one >> two;
cout << endl;
traceMe(one, two);
traceMe(two, one);
system ("pause");
return 0;
}
void traceMe(double x, double y)
{
double z;
if (x != 0)
z = sqrt(y) / x;
else
{
cout << "Enter a nonzero number: ";
cin >> x;
cout << endl;
z = floor(pow(y, x));
}
cout << fixed << showpoint << setprecision(2);
cout << x << ", " << y << ", " << z << endl;
}