c++ convert functiont to class

[Skie]

I need to convert this:

#include <iostream>

using namespace std;


//Displays current balance
void menu1(float balance){
    cout << "Your current balance is: "<<balance<<endl;
    system ("PAUSE");
}
//deposit
void menu2(float balance){
	float numb = 0;
	cout << "How much would you like to deposit today: ";
	cin >> numb;
	float dtotal = balance + numb;
	cout << "you current balance is: "<<dtotal<<endl;	
    system ("PAUSE");
}
//withdraw
void menu3(float balance){
	float withdraw = 0;
	cout << "How much would you like to withdraw today: ";
	cin >> withdraw;
	float wtotal = balance - withdraw;
	cout << "you current balance is: "<<wtotal<<endl;	
    system ("PAUSE");
}

void main() {
    int menu;
    int triger = 0;
	int balance = 2000;
			
 	while(triger==0){
		cout << "1. Get a balance inquiry." << endl;
        cout << "2. Make a deposit." << endl;
		cout << "3. Make a withdrawal." << endl;	
		cout << "4. Exit." << endl;
		cout << "what would you like to do?:";
		cin >> menu;
        switch (menu){
            case 1:
				//Current balance
                menu1(balance);
				break;
            case 2://does the deposit
				menu2(balance);
				break;
            case 3://does the withdrawal
				menu3(balance);
				break;
            default:// exit out the loop
				cout << "Thank you, have a nice day" << endl;
                system ("PAUSE");
				triger=1;
        }
        system ("cls");
    }
}

Into a class style. What is the easiest way?

[Tajin]

use your previous program