How to use Command line in other c program file

[bp04]

I have command line file which i want to use another file.
Example:
1st program:\
int add(int argc,char* argv[])
{
}
in header file
extern int add(int argc, char *argv[])

in main program
add(______,______);
i want to use add function, how can i use it in main.

[Thomas1965]

You can do it with 3 files:

//add.h maybe find a more meaningful name

#ifndef ADD_H
#define ADD_H

 int add(int argc,char* argv[]);

#endif

// add.cpp

#include "add.h"
int add(int argc,char* argv[])
{
// add the code here
return 0;
}

//main.cpp

#include "add.h"

int main(int argc, char *argv[])
{
int result = add(argc, argv)
// use result
return 0;
}

You also need to find a way to add add.cpp to your project.