Untitled

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

main(int argc, char *argv[]){
       FILE *f;
       char path[50], string[50], S;
       int i=0, j=0, k=-1, M, l[100], counter=0;

       if (argc == 1){
           printf("\nDwse to onoma tou arxeiou pros anagnwsh : ");
           scanf("%s", path);
       }
       else 
           strcpy(path, argv[1]);

       f = fopen(path, "r");

       if (!f){                               /*elegxos arxeiou*/
            printf("\n\nSfalma kata to anoigma tou arxeiou %s\n\n", path);
            return 1;
       }

      printf("\nDwse to string pros anazhthsh : ");
      scanf("%s", string);
      M = strlen(string);

      while (!feof(f)){
            S = fgetc(f);
            counter++;
            j=0;
            while ((j<=M) && (S==string[j])){
                  j++;
                  S = fgetc(f);
            }
            if (j=M+1){
                  k++;
                  l[k]=counter;
            }
/*            fseek(f, -j*sizeof(char), SEEK_CUR);*/
      }
      printf("\n\nH leksh %s brethike %d fores sto arxeio %s, stis theseis : \n", string, k, path);
      for(i=0;i<k;i++)
            printf("%d)  %d\n", i+1, l[i]);
      fclose(f);
}