matriz.c

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

int main()
{
	int m[4][4];
	int somadalinha3 = 0;
	float somadacoluna2 = 0;
	float somadamatriz = 0;
	float mGeo = 1;
	float mediaGeo;

	//Setting a different seed
	srand(time(NULL));

	for (int j = 0; j <= 3; j++)
	{
		for (int i = 0; i <= 3; i++)
		{
			m[i][j] = (rand() % 11 + 5);
			somadamatriz += m[i][j];
			if (j == 2)
				somadalinha3 += m[i][j];
			if (i == 1)
				somadacoluna2 += m[i][j];
			if (i == j)
				mGeo = mGeo *m[i][j];
		}
	}

	for (int j = 0; j <= 3; j++)
	{
		printf("\n");
		for (int i = 0; i <= 3; i++)
		{
			printf(" %d |", m[i][j]);
		}
	}

	mediaGeo = pow(mGeo, (1 / 4));

	printf("\n\nSoma da matriz: %.0f\n", somadamatriz);
	printf("Media da matriz: %.2f\n", somadamatriz / 16);
	printf("Soma da 3a linha: %d\n", somadalinha3);
	printf("Media da 2a coluna: %.2f\n", somadacoluna2 / 4);
	printf("Media geometrica: %.2f\n", mediaGeo);

	return 0;
}