making header files and library in c++

[snakec]

hi everybody
i m writing a simple function void show in c or c++ here is the the definition of the function
void show()
{
cout<<" hi this is test";
}
in case o c function i just use printf in place of cout. i know that the function is doing nothing much.
now just for learning or experimentation purpose i just want to know

how to make header file for this function? and than making library for this function ? so that next time i just include the header file and use this function please explain me completely how to do this

[zb0S216C]

how to make header file for this function?

Do you mean a prototype method? A prototype method can be defined like this within a header:

#ifndef PROTO_METHOD_H
#define PROTO_METHOD_H

// Proto_method.h

// This is your prototype method. This will need to be defined within the
// included source file.
void show( void );  // Note that the void doesn't have to be there.

#endif 

This is the source file where the method is defined.

#include "Proto_method.h"
// By including the above header, we have just included the prototype
// of show( ). Now, we need to define it's body.
void show( void )
{
    cout << "This is a sample line.\n";
}

// Rest of your source code here...

int main( )
{
    show( );
}

This is how you would do it within in a library project.

You can define the method within the header if you wanted to, like this:

#ifndef PROTO_METHOD_H
#define PROTO_METHOD_H

void show( void )
{
    cout << "This is a sample line.\n";
}

#endif 

[moorecm]

Use the first method. The second one may lead to multiple definitions of show.