Super Simple Average Calculator

#include "stdafx.h"
#include <iostream>
using namespace std;

int x;
int y;

int main()
{
	cout << "Let's calculate an average!" << endl << endl;			// Simple title, going to figure out colors next
	
	cout << "Input your first number: " << endl << endl;			// Asks for input, no actual search for an input
	cin >> x;								// Grabs users input, stores it in x
	cout << endl;								// Line skip to make it look pretty
	cout << "Your first number is: " << x << endl << endl;			// Spits back x value, because why not

	cout << "Input your second number: " << endl << endl;			// Asks for input, no actual search for an input
	cin >> y;								// Grabs users input, stores it in y
	cout << endl;								// Line skip to make it look pretty
	cout << "Your second number is: " << y << endl << endl;			// Spits back y value, because why not

	system("cls");								// Clear that shit

	cout << "Your average is: " << (x + y) / 2 << endl << endl;		// Outputs the average, super simple.

        return 0;								// Ain't returnin' shit.
}

#include "iostream"
#include "conio.h"
#include "math.h"

using namespace std;

float areaC(float);
float areaR(float, float);
float add(float, float);
float sub(float, float);
float mul(float, float);
float div(float, float);
float power(float, float);
float factorial(float number);
void fibonacci();
void average();
void mean();

void menu();

int main()
{
	float x = 0, y = 0, result = 0;
	int choice;

	menu();
	choice=getch();

	switch (choice)
	{
	case 49:
		cout << "Enter number 1 and 2: ";
		cin >> x >> y;

		result = add(x, y);
		cout << "Addition result of both numbers is: " << result;
		break;

	case 50:
		cout << "Enter number 1 and 2: ";
		cin >> x >> y;

		result = sub(x, y);
		cout << "Subtraction result of both numbers is: " << result;
		break;

	case 51:
		cout << "Enter number 1 and 2: ";
		cin >> x >> y;

		result = mul(x, y);
		cout << "Multiplication result of both numbers is: " << result;
		break;

	case 52:
		cout << "Enter number to find its square: ";
		cin >> x;

		result = power(x, 2);
		cout << "Square of number \""<<x<<"\" is: " << result;
		break;

	case 53:
		cout << "Enter number to find its cube: ";
		cin >> x;

		result = power(x, 3);
		cout << "Cube of number \""<<x<<"\" is: " << result;
		break;

	case 54:
		cout<<"Enter the number to find its factorial: "<<endl;
		cin>>x;
		cout<<"Factorial of the number is "<<factorial(x)<<endl;
		break;

	case 55:
		fibonacci();
		break;

	case 56:
		average();
		break;

	case 57:
		mean();
		break;

	default:
		cout << "wrong choice";
	}

	_getch();
	return 0;
}

float add(float x, float y)
{
	return x + y;
}
float sub(float x, float y)
{
	return x - y;
}
float mul(float x, float y)
{
	return x * y;
}
float power(float x, float y)
{
	return pow(x, y);
}
float factorial(float number)
{
int temp=number;
for(int i=number-1;i>=2;i--)
{
temp=temp*i;
}
return temp;
}
void fibonacci()
{
	{
    int n, t1 = 0, t2 = 1, next = 0;
    cout << "Enter the number of terms in fibonacci series: ";
    cin >> n;
 cout<<endl;
    for (int i = 1; i <= n; ++i)
    {
     
        if(i == 1)
      {
            cout << " " << t1;
            continue;
    }
        if(i == 2)
      {
            cout <<" "<< t2 << " ";
            continue;
      }
        next = t1 + t2;
        t1 = t2;
        t2 = next;
        cout << next << " ";
     }
     }
}
void average()
{
	int j=0,x=0,result=0;;
		cout<<"Enter total amount of numbers to find average of: "<<endl;
		cin>>j;
		for(int i=0;i<j;i++)
		{
			cout<<"Enter number "<<i+1<<":";
			cin>>x;
			result=x+result;
		}
		cout<<"Average result of numbers is "<<result/j;
}
void mean() //or called midrange otherwise mean is same as average^^
	//Mean or Midrange is the smallest number + largest number divided by 2.
{
	int x=0,result=0;
	cout<<"Enter the integers to find their mean, enter 99 to end."<<endl;
	cin>>x;

	int max=x;
	int min=x;
	while(true)
	{
		cin>>x;
		if(x==99){
	     break;
		}
		else if(x>max){
			max=x;
		}
		else if(x<min){
			min=x;
		}
	}
	result=max+min;
	cout<<"Mean or Midrange result of the numbers is "<<result/2;
}
void menu()
{
	cout << "1) Press 1 for Addition .\n2) Press 2 for Subtraction \n"<<
		"3) Press 3 for Multiplication.\n4) Press 4 for Square.\n5) Press 5 for Cube.\n6) Press 6 for Factorial."<<
		"\n7) Press 7 for Fibonacci series.\n8) Press 8 for Average.\n9) Press 9 for Mean."<< endl<<endl<<endl;
}