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

unsigned long duzina(char *ime){
	FILE *f;
	unsigned long pocetak, kraj;

	f = fopen(ime, "r");
	if (f == NULL)
		exit (EXIT_FAILURE);

	fseek(f, 0, SEEK_SET);
	pocetak = ftell(f);

	fseek(f, 0, SEEK_END);
	kraj = ftell(f);

	fclose(f);
	
	return kraj-pocetak;
}

int main(int argc, char *argv[]){
	if(argc<2){
		printf("Unesite ime datoteke.\n");
		exit(EXIT_FAILURE);
	}
	printf("Duzina datoteke %s je %ul\n",argv[1],duzina(argv[1]));
}