#include <iostream.h>
#include <string.h>
#include <stdlib.h>

int add(int, int);  // this is called a prototype
					// it means that later on in our program there will be a function
					// called add

int subtract(int, int);
int multiply(int, int);
double divide(double, double);


int main()
{
// main is actually a "function" that returns an integer

	int num1=0;
	int num2=0;
	int answer=0;
	char choice[20];
	double divideanswer=0;

	// ask the user for two numbers
	// read them into num1 and num2

	cout << "Pick a number: ";
	cin >> num1;

	cout << "Pick another number: ";
	cin >> num2;

	cout << "What operation would you like to do? ";
	cin >> choice;

	
	if (strcmp(choice,"add") == 0)
		answer = add(num1, num2);
	else if (!strcmp(choice, "subtract"))
		answer = subtract(num1, num2);
	else if (!strcmp(choice, "multiply"))
		answer = multiply(num1, num2);
	else 
		divideanswer=divide(num1, num2)

	

	if (strcmp(choice, "divide"))
		cout << "Your answer is " << answer << endl;
	else
		cout << "Your answer is " << divideanswer << endl;

	return 0;
}

int add(int x, int y)
{
	cout << "About to add... " << endl;
	return x + y;

}
int subtract(int x, int y)
{
	return x - y;
}

int multiply(int x, int y)
{
	return x * y;
}

double divide(double x, double y)
{
	if (y == 0)
	{
		cout << "Cannot divide by zero." << endl;
		exit(-1);
	}
	return x / y;

}