Thread: new to c++ 'trying to figure out functions

Ok been messin with this code to try and better my understanding of c++, was hoping someone could help me out.
I commented in the code where i was specificly looking of help. Messed with it can't figure it out. Thanks in advance.

Code:

#include "stdafx.h"
#using <mscorlib.dll>
#include <tchar.h>
#include <stdlib.h>
#include <iostream>
#include <conio.h> 
using namespace std;
using namespace System;

	double intUsersAge();
	double intCurDate();
	void mShowAge(double, double);
	int mfintQuitYN();
	void mfBlank(int);

int _tmain()
{
	double dlbUsersAge;
	double dlbCurDate;
	int intQuit;
	
	
    
	dlbUsersAge = intUsersAge();			
	dlbCurDate = intCurDate();	
	
	do
	{	
		
		system("CLS");
		dlbUsersAge = intUsersAge();
		dlbCurDate = intCurDate();
		mShowAge(dlbUsersAge, dlbCurDate);
		

        intQuit = mfintQuitYN();

	}while (intQuit == 0);

	return 0;
}

void mShowAge(double dlbUsersAge, double dlbCurDate)
{
	
	cout << "You are " << dlbCurDate - dlbUsersAge << " Years Old as of today!\n";
	cout << "\n";
	if ((dlbCurDate - dlbUsersAge)>= 90)
	{
		cout << "\nYou getting pretty old there...\n";
	}
	if (dlbCurDate - dlbUsersAge >= 50 && dlbCurDate - dlbUsersAge <= 89)
	{
		cout << "Congrates, your middle aged...or alittle over\n";
		cout << "\n";
		cout << "You've outlived most others in third world countries....you must be proud\n";
	}
	if (dlbCurDate - dlbUsersAge >= 18 && dlbCurDate - dlbUsersAge <= 49)
	{
		cout << "Your in the prime of your life...lucky dog you\n";
	}
	if (dlbCurDate - dlbUsersAge >= 10 && dlbCurDate - dlbUsersAge <= 17)
	{
		cout << "The crystal ball says your body is changing and you\n";
	cout << "be wantin yourself a car pretty soon.\n";
	}
	if (dlbCurDate - dlbUsersAge >= 1 && dlbCurDate - dlbUsersAge <= 9)
	{
		cout << "Learning to crawl, then walk, then ride your tri-cycle, gotsta love it.\n";
	}
	if (dlbCurDate - dlbUsersAge >= -100 && dlbCurDate - dlbUsersAge <= 0)
	{
		cout << "HOW ARE YOU HERE?!\n";
	}

}
double intUsersAge()
{
double intAge;
	
	Console::Write("Year you were born was? : ");
	intAge = Convert::ToDouble(Console::ReadLine());
		mfBlank(2);

	return intAge;
}

double intCurDate()
{
	double intAge;
	
	Console::Write("Enter current Date Please : ");
	intAge = Convert::ToDouble(Console::ReadLine());
		mfBlank(2);

	return intAge;

}

int mfintQuitYN()   //<------HOW WOULD I MAKE THIS LOOP WITH A Y AND y INSTEAD OF 0.  TRIED CONVERTING, 
//BUT CAN'T DUE TO LOSS OF DATA.  TRIED DECLARING DIFFERENTLY SUCH AS VOID...
//BUT NOT LUCK SO HELP IS NEEDED HERE.  
//OH AND WOULD LIKE TO KEEP IT IN THIS DEFINED FUNCTION.
{
	
	int intReturn;
	
		mfBlank(2);
		cout << "Enter 0 to Try Again or any other number to Quit: ";
cin >> intReturn;
	



	return intReturn;
}
void mfBlank(int intBlank )  //ALSO HERE IF I TRY AND USE MFBLANK TO SPACE IN THE SHOWAGE FUNCTION, IT TELLS ME
//ITS UNDECLARED, BUT IT WORKS IN OTHERS, IS THAT SOMETHING
//SPECIAL ABOUT IF STATEMENTS?
{
	int intCount = intBlank;

	do
	{
		cout <<"\n";
	    intCount = intCount - 1;

	} while (intCount > 0);
	
}

sorry, I'm just playing around with this code, I realize it had alot of stuff it that was exactly needed. I was just trying different things and see what happened, and changing it to different things, sometimes forgetting to take out unused stuff.

#include <conio.h> was needed for the cls, clear screen
...the others I don't really recall what I used them for,
at the time I needed them just as the conio one, but I don't remember.