cudan nacin

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void) {
    char naziv[] = "datoteka.txt";
    FILE * dat = fopen(naziv, "r");
    int niz[100];
    int mat[100][100];
    int i = 0;
    while (fscanf(dat, "%d ", &niz[i++]) == 1);
    int n = sqrt(i);
    int k = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            mat[i][j] = niz[k];
            k++;
        }
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            printf("%d\t", mat[i][j]);

        }
        printf("\n");
    }
    fclose(dat);
}