Two file comparer

tfc.c

/*
 * =====================================================================================
 *
 *       Filename:  tfc.c
 *
 *    Description:  Two File Comparer
 *
 *        Version:  1.0
 *        Created:  25-04-2013 15:00:15
 *       Compiler:  gcc
 *
 *         Author:  Halit Alptekin, info@halitalptekin.com
 *
 * =====================================================================================
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX 100

int main(int argc, const char *argv[])
{
    void compare(FILE*, FILE*);
    FILE *fp1, *fp2;
    
   if (argc == 3){
        if ((fp1 = fopen(*++argv, "r")) == NULL){
            fprintf(stderr, "%s: dosya acilamadi\n", *argv);
            exit(2);
        } else if ((fp2 = fopen(*++argv, "r")) == NULL){
            fprintf(stderr, "%s: dosya acilamadi\n", *argv);
            exit(2);
        } else {
            compare(fp1, fp2);
            fclose(fp1);
            fclose(fp2);
            exit(0);
        }
   } else {
        fprintf(stdout, "kullanim ./tfc file1 file2 \n");
        exit(1);
   }

    return 0;
}

void compare(FILE *fp1, FILE *fp2){
    char line1[MAX], line2[MAX];
    char *lp1, *lp2;

    do{
        lp1 = fgets(line1, MAX, fp1);
        lp2 = fgets(line2, MAX, fp2);

        if(lp1 == line1 && lp2 == line2){
            if(strcmp(line1, line2) != 0){
                fprintf(stdout, "ilk farkli satir\n%s\n", line1);
                lp1 = lp2 = NULL;
            }
        }else if(lp1 != line1 && lp2 == line2){
            fprintf(stdout, "ilk dosyanin son satiri\n%s\n", line2);
        }else if(lp1 == line1 && lp2 != line2){
            fprintf(stdout, "ikinci dosyanin son satiri\n%s\n", line1);
        }

    }while(lp1 == line1 && lp2 == line2);
}