#include <stdio.h>
#define R_LEN 80

main()
{ 
    FILE *inpdat;
    FILE *outdat;
    char inpname[15], outname[15];
    char raw[R_LEN];
    int r_num;
    printf("Vnesi ime vhodne datoteke:");
    scanf("%s", inpname);
    printf("\nVnesi ime izhodne datoteke:");
    scanf("%s", outname);
    inpdat=fopen(inpname, "r");
    outdat=fopen(outname, "w");

    if ((!inpdat) || (!outdat))
        printf("Ne morem odpreti datoteke s tem imenom!\n");
    r_num=1;
    fgets(raw, R_LEN, inpdat);
    while ((!feof(inpdat)) && (!ferror(outdat)))
    {
        fprintf(outdat, "%4d", r_num);
        printf("Pisem vrstico %4d\n", r_num); 
        fputs(raw, outdat);
        r_num++;
        fgets(raw, R_LEN, inpdat);
    }
    fclose(inpdat);
    fclose(outdat);
}