'Undefined reference to `WinMain' ' error on minimal script, Dev-C++

Question

I'm new to C and programming. I'm on Windows 10, I just installed Dev-C++ and I'm learning how to call functions from other files: i wrote this function to sum two numbers, and I call it from the main script.

The problem is that when i compile the func.c file I get the error in title, so if I run the main file it doesn't recognize the "sum" function. This is the main.c file:

#include <stdio.h>
#include "func.h" 
    main(){
      int x,y,s;
      scanf("%d %d",&x,&y);
      s = sum(x,y);
      printf("\n%d",s); 
      }

This is the header file:

#ifndef FUNC_H_INCLUDED
#define FUNC_H_INCLUDED

int func(int a, int b);

#endif // FUNC_H_INCLUDED

And this is the code of the sum function in a func.c file:

#include <stdio.h>
#include "func.h"
int func(int a, int b){
    return(a+b);
}

I did read lots of other questions, but they didnt help in my case, or I didnt get the tricky answer. Thank you.

Answer 1

In case you are using Embarcadero's Dev-C++. I use their free compiler since it is "portable".

func.c and func.h both contain a function called func while your main file has a function called sum , you must have a consistency in the names, you can do s=func(x,y) and that should work, but a good practice is doing the opposite and replace func in other files by sum . And you must compile the 3 files, compiling 1 or 2 isn't enough.

To compile them using Embarcadero's free compiler:

C:\path\to\compiler\bcc32x func.c func.h main.c

It will give you main.exe that you can run from the command prompt.