Free function compiling error

[TheMusician]

Error:

Undefined                       first referenced
 symbol                             in file
die()                               /var/tmp//cckddR2X.o
ld: fatal: symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status
 

This is my die.cpp:

#include <math.h>
#include <string>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "die.h"
 
 
 
int die(){
 
        srand (time(NULL));
        int number = rand() % 6 + 1;
 
        return number;
 
}
 

This is my die.h:

#ifndef __DIE_H
#define __DIE_H
 
 
int die();
 
 
#endif
 

I'm not sure what I'm doing wrong. Did I leave something out of my .h file? Any feedback is appreciated.

[johny10151981]

your code is fine. what is your compilation command???

i mean

#g++ -c die.cpp -o die
 

if it is not then, you are getting error because you dont have define main function

[donbock]

I don't know that this has anything to do with your link error, but I believe you should be including <cmath> instead of <math.h>, <cstdio> instead of <stdio.h>, <cstdlib> instead of <stdlib.h>, and <ctime> instead of <time.h>.

This doesn't have anything to do with your link error, but I believe you should say "int die(void)" instead of "int die()" in die.h and die.cpp.

I doubt this has anything to do with your error, but you should not get in the habit of using names with leading underscores (__DIE_H). The C Standard (and perhaps the C++ Standard) reserves all such names for use by behind-the-scenes compiler internals. Change this name to something like DIE__H.

You might verify that "die" isn't a reserved word or name by changing all instances of "die" in die.h and die.cpp to something else, perhaps "xxdie" and confirm that the error still occurs. No need to change the file names.