Thread: Preventing an infinite loop

Well, I've just started learning C++ yesterday, and it's the first language I've ever learned.

I'm following some tutorials online, and I was messing around to try and create a simple calculator. However, I've hit two dead ends. Well, here's the source code first:

Code:

#include <iostream>

using namespace std;



//This is for adding x and y.
int addition(int x, int y) {
	return x + y;
}


//This is for multiplying x and y.
int multiplication(int x, int y) {
	return x * y;
}


//This is for dividing x and y.
int division(int x, int y) {
	return x / y;
}


//This is for subtracting x and y.
int subtraction(int x, int y) {
	return x - y;
}




//This is the main interface for the calculator.
int main() {
	//The below 3 lines define the two numbers that will be entered by the user and the operation (addition, subtraction, etc).
	int x;
	int y;
	char z;


	cout << "Welcome to KK's calculator. Press any key to continue..." <<endl;
	cin.get();

	while (true) {
	cout << "Input your first number: " << endl;
	cin >> x;
	cin.ignore();
	cout << "Input your operation (+, -, *, /): " << endl;
	cin >> z;
	cin.ignore();
	cout << "Input your second number and press Enter to get your solution: " << endl;
	cin >> y;
	cin.ignore();
	/*if (y != 0) {
	} else {
		cout<< "Invalid operation. 0 cannot be the divisor." << endl;
	}*/
	

	if (z == '+') {
		cout << "Answer: " << addition(x,y) << endl << endl;
	} else if (z == '-') {
		cout << "Answer: " << subtraction(x,y) << endl << endl;
	} else if (z == '*') {
		cout << "Answer: " << multiplication(x,y) << endl << endl;
	} else if (z == '/') {
		cout << "Answer: " << division(x,y) << endl;
	} else {
		cout << "Invalid operation. Please try again." << endl << endl;
	}

	}

	
	cin.get();
	return 0;
}

The first problem is that I want to prevent my program from going into an infinite loop if someone accidentally inputs a letter instead of a number.

The second is, I want to make sure you can't divide by 0, otherwise an error comes up.
I've tried to solve the 0 problem (it's in comments atm), but there's still a problem with it. It pops up my error message, but the program continues, and it breaks the application.

I would appreciate any tips and help. Suggestions to improve any existing code are welcome as well