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

int ruutmaatriks(int rida, int veerg);
int peadiagonaal(int **M, int rida, int veerg);

int main(void) {
	int rida, veerg;
	FILE *mfi, *fi;
	mfi=fopen("mootmed.txt", "r");
	fscanf(mfi, "%d", &rida);
	fscanf(mfi, "%d", &veerg);
	printf("rida = %d\nveerg = %d\n",rida, veerg);
	int ** M = calloc(rida, sizeof(int*));
	fclose(mfi);
	fi=fopen("andmed.txt", "r");
	for (int i=0; i<rida; i++) {
		M[i] = calloc(veerg, sizeof(int));
		for (int j=0; j<veerg; j++) {
	    fscanf(fi, "%d", &M[i][j]);
		}
	}
	for (int i=0; i<rida; i++) {
		for (int j=0; j<veerg; j++) {
	    printf("%3d", M[i][j]);
		}
		printf("\n");
	}
	fclose(fi);
	peadiagonaal(M, rida, veerg);
	return 0;
}

int ruutmaatriks(int rida, int veerg) {
	if (rida==veerg) return 1;
	else return 0;
}

int peadiagonaal(int ** M, int rida, int veerg) {
	if (ruutmaatriks(rida, veerg)==1) {
		FILE *fo;
		fo=fopen("tulemused.txt", "a");
		int summa=0;
		printf("Peadiagonaali elemendid on: ");
		fprintf(fo, "Peadiagonaali elemendid on: ");
		for(int i=0; i<rida; i++) {
	    printf("%3d",M[i][i]);
	    fprintf(fo, "%3d",M[i][i]);
	    summa+=M[i][i];
		}
		printf("\nPeadiagonaali elementide summa on: %d\n",summa);
		fprintf(fo, "\nPeadiagonaali elementide summa on: %d\n",summa);
		return summa;
		fclose(fo);
	}
}