Comments on: 1.4 — A first look at functions

By: Alex

Alex — Fri, 11 Jul 2008 01:44:00 +0000

You actually can have two functions in C++ that call each other. However, to do this, you have to use function prototypes, which we I haven’t covered at this point in the tutorials. I cover this in lesson 1.7.

By: Joyel

Joyel — Sat, 28 Jun 2008 04:57:18 +0000

I come from a pretty decent background. I have had 7 years experience in my overall field. I know PHP/Javascript like the back of my hand…I wanted to get into C++ lately and I am working towards it. So far I love the language. The ONE thing I don’t like so far about it is having to put the main function at the bottom (or the other way you mentioned). It seems kind of unnecessary and definitely doesn’t sound like it’ll be very neat and manageable. The hard part is remebring to make a function before that…the one problem I would have is if I had 2 functions that called each other.
In PHP you can have 1 function and then another function and because they are related sometimes each one of the functions ends up calling the OTHER function once. So that leaves you with something you can’t do in C++. You can’t make both functions above each other (impossible) so it won’t work like that.

By: Mitul

Mitul — Tue, 17 Jun 2008 04:18:56 +0000

/* Program to get double value of Number*/

#include
#include

int doubleNumber(int x)
{
return x * 2;
}

void main()
{
int x;
clrscr();
cout << "n Enter the number : ";
cin >> x;
cout << "n The double value is : "< getch();
}

By: Learn C++ - » 1.3 — A first look at variables (and cin)

Learn C++ - » 1.3 — A first look at variables (and cin) — Wed, 23 Apr 2008 02:20:46 +0000

[...] andrew: [ I answered your question in my forum. -Alex ] [...]

By: Learn C++ - » 1.5 — A first look at operators

Learn C++ - » 1.5 — A first look at operators — Wed, 23 Apr 2008 01:37:27 +0000

[...] andrew: [ I answered your question in my forum. -Alex ] [...]

By: andrew

andrew — Mon, 21 Apr 2008 10:14:07 +0000

[ I answered your question in my forum. -Alex ]

By: Alex

Alex — Thu, 17 Apr 2008 05:25:34 +0000

There is no difference. They are functionally equivalent.

By: sony

sony — Wed, 16 Apr 2008 16:27:01 +0000

what is the difference between the following declarations
void show()and void show(void)

By: Alex

Alex — Wed, 12 Mar 2008 21:17:59 +0000

Try:

int main()
{
	int x;
	cin >> x;
	x = doubleNumber(x);
	cout << x << endl;
	cin.clear();
	cin.ignore(255, '\n');
	cin.get();
	return 0;
}

By: Masss

Masss — Wed, 12 Mar 2008 19:38:44 +0000

Hi Alex,

I was just doing question 5 of the quiz like everyone else, but the problem is that when I input a number the window closes once immediately after it displays the answer. I know you have to add the statements like cin.get(); cin.clear(); and cin.ignore(255, ‘/n’);, however, it does doesn’t prevent it from happening. Heres my coding.

// question5.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include 

using namespace std;

int doubleNumber(int x)
{
	return 2 * x;
	cin.get();
}

int main()
{
	int x;
	cin >> x;
	x = doubleNumber(x);
	cout < < x << endl;
	cin.get();
	return 0;
}

I tried adding cin.get, as I have commented. THANKS