header file

[mescaline]

Hi I have the following doubt about header files --
I have the foll. 3 files in a folder.

File 1: one.cpp
#include <hel.h>
#include <iostream>
using namespace std;

int main(){
hello();
return 0;
}


File 2: hel.h
#ifndef HEL_H
#define
void hello();
#endif

File 3: hel.cpp
#include <hel.h>
void hello(){
cout << "Hello" << endl;
}

--------------
I just need the output Hello using this header file formatting. I have
these three files in a folder. How should I compile these three files
using g++? WHen I just try g++ one.cpp, I get the output: hel.h: No
such file or directory

Thanks
m

 

[Jeff Schwab]

Hi I have the following doubt about header files --
I have the foll. 3 files in a folder.

File 1: one.cpp
#include <hel.h>
#include <iostream>
using namespace std;

int main(){
hello();
return 0;
}


File 2: hel.h
#ifndef HEL_H
#define
void hello();
#endif

File 3: hel.cpp
#include <hel.h>

Should be:

#include "hel.h"

The angle brackets (<>) tell the compiler to look in a set of standard
directories, not the local directory. Alternatively, since you're using
g++, check out the compiler's -I option.

 

[Chris Mantoulidis]

Hi I have the following doubt about header files --
I have the foll. 3 files in a folder.

File 1: one.cpp
#include <hel.h>

#include "hel.h"

#include <iostream>
using namespace std;

int main(){
hello();
return 0;
}


File 2: hel.h
#ifndef HEL_H
#define

it should be #define HEL_H

void hello();
#endif

File 3: hel.cpp
#include <hel.h>

#include "hel.h"

void hello(){
cout << "Hello" << endl;
}

--------------
I just need the output Hello using this header file formatting. I have
these three files in a folder. How should I compile these three files
using g++? WHen I just try g++ one.cpp, I get the output: hel.h: No
such file or directory

Thanks
m

Wrong way to compile them... Do:

g++ -c hel.cpp
g++ -c one.cpp
g++ -o one one.cpp

I suppose you are on Linux, that's why I add no extension to the
executable. You can change it if you want

 

[Rolf Magnus]

Wrong way to compile them... Do:

g++ -c hel.cpp
g++ -c one.cpp
g++ -o one one.cpp

Uhm, and do you think that will be better? ITYM for the last line:

g++ -o one one.o hel.o

For such small programs, however, it's simpler to do it all in one line:

g++ one.cpp hel.cpp -o one

 

[mescaline]

#include "hel.h"


it should be #define HEL_H


#include "hel.h"


Wrong way to compile them... Do:

g++ -c hel.cpp
g++ -c one.cpp
g++ -o one one.cpp

I suppose you are on Linux, that's why I add no extension to the
executable. You can change it if you want

Hi Thanks for your reply
But it still doesn't work your way. It spits:

hel.cpp:1: hel.h: No such file or directory

Please help

m

 

[Chris Mantoulidis]

Uhm, and do you think that will be better? ITYM for the last line:

g++ -o one one.o hel.o

I did a bad typo I was meaning to do that ---^

For such small programs, however, it's simpler to do it all in one line:

g++ one.cpp hel.cpp -o one

maybe

 

[Chris Mantoulidis]

Hi Thanks for your reply

But it still doesn't work your way. It spits:

hel.cpp:1: hel.h: No such file or directory\

Yo sure you've got them in the same directory? And you sure you