#include <stdlib.h>
#include <stdio.h>
 
int main(void) {
		int filas = 5, columnas = 4;
		int **matriz = (int **) malloc(filas*sizeof(int*));
		int *a;
		int i = 0;
		for(int fila = 0; fila < filas; fila++) {
			matriz[fila] = (int *) malloc(columnas * sizeof(int));
			for (int columna = 0; columna < columnas; columna++) {
				if ((fila ==2) && (columna == 3)) {
					a = (int*)malloc(sizeof(int)*56);
					*a = i;
				}
				matriz[fila][columna] = i;
				i++;
			}
		}
 
		for(int fila = 0; fila < filas; fila++) {
			int *pColumna = matriz[fila];
			for (int columna = 0; columna < columnas; columna++) {
				printf("%i\n", *pColumna);
				pColumna++;
			}
		}
 
		printf("a %i\n", *a);
 
		for(int fila = 0; fila < filas; fila++) {
			printf("Ptr %i %ld\n", fila, matriz[fila]);
		}
 
 
}
 

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