Trying to find out why my code keeps infinite looping - c++

Question

I am very new to programming so pardon my lack of knowledge. I am trying to create a simple menu in which I am going to execute a few problems by pressing 1,2,3 etc. but my code keeps looping over and over again and I can't understand why.
int main()
{
int choice;
do
{
cout << "\t|--------------------------- Menu ---------------------------|" << endl;
cout << "1.|- Добавяне на телефонни номера -|" << endl;
cout << "2.|- Извеждане на всички телефонни абонати на екрана -|" << endl;
cout << "3.|- Месечно потребление -|" << endl;
cout << "4.|- Изчисление на месечна такса -|" << endl;
cout << "5.|- Справки за абонатите с под меню -|" << endl;
cout << "6.|- Край на програмата -|" << endl;
switch(choice)
{
case 1:
break;
case 2:
break;
case 3:
break;
case 4:
break;
case 5:
break;
case 6:
cout << "|- Благодаря ви -|" << endl;
return 0;
}
}
while(choice != 6);
}

Answer 1

You need to use cin in your code in order to change what choice is every time that you go through the loop. Also it is a good idea to handle invalid user inputs. This is done by (!(cin >> choice)) until input will return true. While this is the case you want to cin.clear() and cin.ignore() to reset the state of the stream so that you can keep asking the user for a correct input.
#include<iostream>
using namespace std;
int main()
{
// it is a good idea to initialize the variable when you create it
int choice = 0;
do
{
cout << "\t|--------------------------- Menu ---------------------------|" << endl;
cout << "1.|- Добавяне на телефонни номера -|" << endl;
cout << "2.|- Извеждане на всички телефонни абонати на екрана -|" << endl;
cout << "3.|- Месечно потребление -|" << endl;
cout << "4.|- Изчисление на месечна такса -|" << endl;
cout << "5.|- Справки за абонатите с под меню -|" << endl;
cout << "6.|- Край на програмата -|" << endl;
// this loop will handle incorrect inputs from the user
// for example entering a char, when the stream is expecting an int
while (!(cin >> choice))
{
cin.clear();
cin.ignore();
cout << "Please enter a valid choice: ";
cin >> choice;
}
switch (choice)
{
case 1:
break;
case 2:
break;
case 3:
break;
case 4:
break;
case 5:
break;
case 6:
cout << "|- Благодаря ви -|" << endl;
return 0;
}
} while (choice != 6);
}