C error in linking library - c

Question

I am begginer in C and I have a problem with linking .c and .h files into main.c
I tried to link it and it looks like this in main.c :
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "hangman.h"
#include "hangman.c"
#include <string.h>
#include <time.h>
#include <ctype.h>
int main(void)
{
char secret[20];
srand(time(NULL));
getWord(secret);
hangman(secret);
return 0;
}
and like this in .c file
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>
#include "hangman.h"
int isWordGuessed(const char secret[], const char lettersGuessed[]){
int pom = 0;
int i,j;
for(i = 0; i < strlen(secret); i++){
for (j= 0; j < strlen(lettersGuessed); j++)
{
if(secret[i] == lettersGuessed[j])
pom = 1;
}
if(pom == 1){
pom = 0;
}
else{
return 0;
}
}
return 1;
}
and like this in .h file
#define WORDLIST_FILENAME "words.txt"
int isWordGuessed(const char secret[], const char lettersGuessed[]);
Program just throws an exception. It tells me:
hangman.o: In function isWordGuessed':
hangman.c:(.text+0x0): multiple definition ofisWordGuessed'
main.o:main.c:(.text+0x0): first defined here

Answer 1

#include "hangman.h"
#include "hangman.c"
Do not include .c source files in your program. The include directive will simply copy hangman.c in your main.c.