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

void SimpleFunction();
int Cubed(int);
void GetCube();
int Power(int,int);
void GetPowers();
void CreateArray();
void PopulateArray(int arr[], int size);
void DisplayArray(const int arr[], int size);
	struct Person
	{
		string firstName;
		string lastName;
		int age;
	};
void CreateStructure();
void DisplayStructure(const Person * p1);
//these functions are for function pointers

int Add(int,int);
int Subtract(int, int);
int Mult(int, int);

void DoMath(int,int, int (*pFunction)(int,int));

void UseDoMath();


int main()
{
		//SimpleFunction();
		//GetCube();
	    //GetPowers();
	//CreateArray();
	//CreateStructure();
	UseDoMath();
		
		system("PAUSE");
}

void SimpleFunction()
{

	cout << "This is a simple function " << endl;
}

void GetCube()
{
	cout <<"Enter a Number" << endl;
	int number;
	cin>> number;
	cout << "The cube of " << number << " is " << Cubed(number) << endl;
}


int Cubed(int number)
{
	return number * number * number;
}

void GetPowers()
{
	int num, pow;
	cout << "Enter a number" << endl;
	cin >> num;
	cout << "Enter the exponent" << endl;
	cin >> pow;
	cout <<  num << " to the " << pow << " Equals " << Power(num, pow)<<endl;

}

int Power(int n, int p)
{
	int total=1;
	for(int i=1;i<=p;i++)
	{
		total *= n;
	}
	return total;
}

void CreateArray()
{
	int myArray[5];
	PopulateArray(myArray, 5);
}

void PopulateArray(int arr[], int size)
{
		srand(time(0));
		
		for (int i=0;i<size;i++)
		{
			arr[i]=rand() % 360;
		}

		DisplayArray(arr, size);

}

void DisplayArray(const int arr[], int size)
{
		for(int i=0;i<size;i++)
		{
			cout << arr[i] << endl;
		}
}
void CreateStructure()
{


	Person pers =
	{
		"John",
		"Smith",
		16
	};

	Person * pPerson=&pers;

	DisplayStructure(pPerson);
}

void DisplayStructure(const Person * p1)
{
	cout << p1->firstName << endl;
	cout<< p1->lastName << endl;
	cout << p1->age <<endl;
}

int Add(int num1, int num2)
{
	return num1+ num2;
}
int Subtract(int num1, int num2)
{
	return num1- num2;
}
int Mult(int num1, int num2)
{
	return num1 * num2;
}

void DoMath(int n1, int n2, int (*pFunction)(int, int))
{
	cout << (*pFunction)(n1,n2)<<endl;
	cout<<endl;
}

void UseDoMath()
{
	int num1, num2;
	cout << "Enter the first Number"<<endl;
	cin >> num1;
	cout << "Enter the second number " <<endl;
	cin >>num2;
	cout << " the sum is " ;
	DoMath(num1, num2,Add);
	cout << "The Difference is ";
	DoMath(num1, num2, Subtract);
	cout << "The product is ";
	DoMath(num1, num2, Mult);
	cout << "The exponent is ";
	DoMath(num1, num2, Power);




}