poredjenje matrica, nepotpuno

#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 20



void ucitaj(FILE *in, int a[MAX_SIZE][MAX_SIZE], int *n)
{
int j, i, k;


fscanf(in ,"%d", n);
k = *n;

for(i=0; i<k; i++){
    for(j=0; j<k; j++){
        fscanf(in, "%d", &a[i][j]);
            }
         }

}

void ispisi (FILE *out, int a[MAX_SIZE][MAX_SIZE], int n)
{
    int j, i;
    int k = n;

for(i=0; i<k; i++){
    printf("\n");

    for(j=0; j<k; j++){

        fprintf(out, "%d", a[i][j]);
            }
         }

}
void Poredjenje(int niz1[MAX_SIZE][MAX_SIZE], int niz2[MAX_SIZE][MAX_SIZE], int n1, int n2){

int j1, j2, i1, i2;
for

int main (int brArg,char *arg[])
{
int big[MAX_SIZE][MAX_SIZE], big_n;
int small[MAX_SIZE][MAX_SIZE], small_n;

FILE *in;
in = fopen(arg[1], "r");
FILE *out;
out = fopen(arg[2], "w");

/*if(()==NULL){
    printf("Datoteka nije otvorena\n"); }
*/
ucitaj(in, big, &big_n);
ucitaj(in, small, &small_n);

puts("Big:"); ispisi(out, big, big_n); printf("\n");
puts("Small:"); ispisi(out, small, small_n); printf("\n");

fclose(in);
fclose(out);



return 0;
}