Comments on: 1.7 — Forward declarations

By: Joyel

Joyel — Sat, 28 Jun 2008 05:23:05 +0000

This helped explain a lot of things I was previously having problems with.

By: Mitul

Mitul — Tue, 17 Jun 2008 05:40:25 +0000

/* I have writen one another Program like example 5*/

#include
#include

int add(int x, int y, int z);

void main()
{
int x,y,z;
clrscr();
cout << "n Enter three number : n";
cin >> x;
cin >> y;
cin >> z;
cout << "n" << x << " + " << y << " + " << z << " = " << add(x, y, z) << endl;
getch();
}

int add(int x, int y, int z)
{
return x + y + z;
}

By: Learn C++ - » 1.8 — Programs with multiple files

Learn C++ - » 1.8 — Programs with multiple files — Wed, 23 Apr 2008 01:39:14 +0000

[...] 2007 Prev/Next Posts « 1.7 — Forward declarations | Home | 1.9 — Header files » Saturday, June 2nd, 2007 at 8:26 [...]

By: Alex

Alex — Mon, 24 Mar 2008 22:18:57 +0000

stdafx.cpp is a file that Microsoft compilers use to do precompiled headers (which makes you program compile faster), if you sent them up correctly. If you don’t want to deal with stdafx.h, you can always turn precompiled headers off (in the project settings).

By: Gary

Gary — Sun, 23 Mar 2008 03:46:40 +0000

Hi there. I was wondering how come I have to type #include stdafx.h now. I haven’t used my compiler for a while, so I was just wondering. I can’t do this program unless I do it, but the Hello World one works just fine without it.

By the way, in my older programs, the source files say “main.cpp” but the new one has 2 files, one that says stdfax.cpp and another one with the title of my project.

I’m new to programming, so if my questions sound dumb, bear with me.

By: Dan

Dan — Sat, 02 Feb 2008 00:25:41 +0000

Ahh, ok… I’m getting a clearer picture of this now (re: my question a few days ago in the previous ‘functions’ section
when I asked about the order of functions in Cpp code). This helps explain the reasons why it must be. :)

Thanks Alex!
-Dan

By: Alex

Alex — Mon, 28 Jan 2008 19:49:27 +0000

Please repost your question with the code embedded inside PRE html tags.

By: josh

josh — Mon, 28 Jan 2008 19:34:16 +0000

rying out your second example i wrote:

#include

int add(int x+int y)
{
return x+y;
}

int main()
{
using namespace std;
cout

By: Alex

Alex — Fri, 14 Dec 2007 04:08:04 +0000

GovZ,

Forward declarations are used only to tell the compiler about the existence of a function (or class or variable) before it is actually implemented.

This information is only used during compile time. Consequently, forward declarations will not make your executables larger or slower.

By: GovZ

GovZ — Fri, 14 Dec 2007 02:44:12 +0000

Hello guys,

You have a great tutorial here. Worthy of publication, IMHO.

Anyways one question. Does Forward Declaration by function prototyping have an effect on the execution time or is this only used during the creation of some hash table or something? And that in the resulting executable, this step is not actually “re-read”.

I hope I make sense. Thanks for your answers in advance. =)