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MenuBuilder: wont show the menu selection

mheitn66 (3)
Not understanding why the choice entered in the testMenus1 will not run through the switch statement in the choseMenu() function located in menuBuilder1.cpp. I am using classes for the first time so any help or hint on what I am missing will be very much appreciated. 

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testMenu.cpp
#include <iostream>
#include "MenuBuilder1.h"
using namespace std;
int main()
{
	MenuBuilder1 transaction;
	int choice = 0;
	while(choice !=7)
	{
		transaction.buildMenu();
		cin>>choice;
		transaction.choseMenu(choice);
	}
	return 0;
}

MenuBuilder1.cpp


#include <iostream>
#include "MenuBuilder1.h"
using namespace std;
MenuBuilder1::MenuBuilder1()
{
	double balance= 2439.45 ;
}
bool exitFlag;
int buildMenu()
{
	cout<<"\nWelcome to the DeVry Bank Automated Teller Machine\n";
	cout<<"1)   Check balance\n";
	cout<<"2)   Make withdraw\n";
	cout<<"3)   Make deposit\n";
	cout<<"4)   View account information\n";
	cout<<"5)   View Statement\n";
	cout<<"6)   View bank information\n";
	cout<<"7)   Exit";
	cout<<endl;
}
void MenuBuilder1::viewStatement()
{
	cout<<"\n\n01/01/11 -McDonalds-$6.27";
        cout<<"01/15/11 - Kwik Trip - $34.93 ";
        cout<<"02/28/11 - Target - $124.21";
}
void MenuBuilder1::viewAcctInfo()
{
	cout<<"\n\nName: MIchael Heitner";;
	cout<<"\nAccount Number: 1234554321";
	
}
void MenuBuilder1::viewBankInfo()
{
	cout<<"Devry Bank, established 2011"<<endl;
	cout<<"(123) 456-7890"<<endl;
	cout<<"12345 1st St."<<endl;
	cout<<"Someplace, NJ 12345"<<endl;
}
double balance;
void MenuBuilder1::displayBalance()
{
  cout<<"\nCurrent balance is:$2439.45 "<<endl;
}
void MenuBuilder1::depositAcct()
{
  double deposit;
  cout<<"\nEnter amount to Deposit :- ";
  cin>>deposit;
  balance = balance + deposit;
}
void MenuBuilder1::withdrawAcct()
{
  double withdraw;
  cout<<"\nHow much would you like to withdraw?";
  cin>>withdraw;
  balance=balance-withdraw;
  
}
int MenuBuilder1::choseMenu(int &choice)
{
	switch(choice)
	{
	case '1':
		displayBalance();
		break;
	case '2' : 
		withdrawAcct();
		break;
	case '3' :
		depositAcct();
		break;
	case '4' :
		viewAcctInfo();
		break;
	case '5':
		viewStatement();
		break;
	case '6' :
		viewBankInfo();
		break;	
	case '7':
		exitFlag=false;
	
	}
	return choice;
}


Header File:
MenuBuilder1.h
#pragma once

class MenuBuilder1
{
public:
	MenuBuilder1();
	int buildMenu();
	void viewStatement();
	void viewAcctInfo();
	void viewBankInfo();
	int choice;
        void displayBalance();
        void depositAcct();
	double deposit;
        void withdrawAcct();
	double withdraw;
	int choseMenu(int &choice);
private:
	double balance;
	

};
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