Help with homework

mikashane (7)
This program is supposed to be a math tutor using functions. I could also use arrays.My problem is when I run the program it shows the menu, I enter 1 for addition (That is all I setup so far) I enter the correct answer, it tells me very good and goes back to the menu. It is supposed to ask another question.

Can someone tell me what I did wrong.

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// This program is a math tutor
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <ctime>
using namespace std;

void getMenu ();
int addition (int, int);

void getRandon ( int &, int &);

int main()
{
    int num1, num2;
	int choice;
	int answer;

	do
	{

		getMenu();
		cin >> choice;
		while (choice < 1 || choice > 6)
		{
			cout << "Enter a choice in the range of 1 - 6: \n";
			cin >> choice;
		}
		    
        getRandon (num1, num2);
	

		switch (choice)
		{
			case 1: answer = addition (num1, num2);
			break;	
			
          
		}
    } while (choice != 6 && answer != -1);
        
	
        

    return 0;
}


void getMenu()
{
    
    
	cout << "Menu \n\n"
		<< "1. Addition \n"
		<< "2. Subtraction \n"
		<< "3. Multiplication \n"
		<< "4. Division \n"
		<< "5. Modulus \n"
		<< "6. Quit \n\n"
		<< "Enter your choice: ";
}

int addition (int n1, int n2)
{
    int answer;
	int countCorrect = 0;
	int countIncorrect = 0;

	cout << "What is " << n1 << " + " << n2 << endl;
	cout << "Enter your answer or (-1 to return to the menu.)\n";
	cin >> answer;
	if (answer != -1)
	{
		if (answer != n1 + n2)
		{
			cout << "No. Try again!\a\n";
			cin >> answer;
		}

		else 
		{
			cout << "Very Good \n";
		}
	}
	return answer;
}






void getRandon (int &rNum1, int &rNum2)
{
    
    srand(time(0));
    rNum1 = 1 + rand() % 50;
    rNum2 = 1 + rand() % 50;
        
}
Smac89 (1727)
remove getMenu from the do-while loop in main
mikashane (7)
I have changed the code to this. The problem is that when I enter -1 the program does not go back to the menu.

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// This program is a math tutor
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <ctime>
using namespace std;

void getMenu (int &);
void addition (int, int);

void getRandon ( int &, int &);

int main()
{
    int num1, num2;
	int choice;
	 
	
	getMenu(choice);
	
	
	do
	{
		getRandon (num1, num2);
		
		switch (choice)
		{
			case 1: addition(num1,num2); 
				break;	
		}

    } while (choice != 6);
        
	return 0;
}


void getMenu(int &rchoice)
{
    
    
	cout << "Menu \n\n"
		<< "1. Addition \n"
		<< "2. Subtraction \n"
		<< "3. Multiplication \n"
		<< "4. Division \n"
		<< "5. Modulus \n"
		<< "6. Quit \n\n"
		<< "Enter your choice: ";
	cin >> rchoice;
		while (rchoice < 1 || rchoice > 6)
		{
			cout << "Enter a choice in the range of 1 - 6: \n";
			cin >> rchoice;
		}
}

void addition (int n1, int n2)
{
    int answer;
	int countCorrect = 0;
	int countIncorrect = 0;

	//do
	//{

		cout << "What is " << n1 << " + " << n2 << endl;
		cout << "Enter your answer or (-1 to return to the menu.)\n";
		cin >> answer;
		if (answer != -1)
		{
		if (answer != n1 + n2)
		{
			cout << "No. Try again!\n";
			cin >> answer;
		}

		else 
		{
			cout << "Very Good \n";
		}
		}
	//} while (answer != -1);
}

void getRandon (int &rNum1, int &rNum2)
{
    
    srand(time(0));
    rNum1 = 1 + rand() % 50;
    rNum2 = 1 + rand() % 50;
        
}
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