#include <stdio.h>

int main () {
  int i,j;
  int a[4][4] = {
    { 1, 2, 3, 4}, 
    { 5, 6, 7, 8},
    { 9,10,11,12},
    {13,14,15,16} };
  int *la[4] = { a[0], a[1], a[2], a[3] };

  int lb0[4] = { -1, -2, -3, -4};
  int lb1[4] = { -5, -6, -7, -8};
  int lb2[4] = { -9,-10,-11,-12};
  int lb3[4] = {-13,-14,-15,-16};
  int *b[4]  = { lb0, lb1, lb2, lb3 };

  int ca[16];
  int *c[4]  = { ca, ca+4, ca+8, ca+12 }; 
  int **d;

  printf("Matrix A:\n");  
  for(i=0; i<4; i++)
    for(j=0; j<4; j++)
      printf("a[%1d][%1d]=%2d%c",i,j,
	     a[i][j],j==3?'\n':' ');

  printf("1. Zeile: ");
  for(j=0; j<4; j++)
    printf("a[0][%1d]=%2d%c",j,
	   a[0][j],j==3?'\n':' ');
  
  printf("2. Zeile: ");
  for(j=0; j<4; j++)
    printf("a[1][%1d]=%2d%c",j,
	   *(a[1]+j),j==3?'\n':' ');

  printf("3. Zeile: ");
  for(j=0; j<4; j++)
    printf("a[2][%1d]=%2d%c",j,
	   *(*(a+2)+j),j==3?'\n':' ');
  
  printf("4. Zeile: ");
  for(j=0; j<4; j++)
    printf("a[3][%1d]=%2d%c",j,
	   *(la[3]+j),j==3?'\n':' ');
  
  d = la;
  for(i=0; i<4; i++)
    for(j=0; j<4; j++)
      c[i][j] = d[i][j]+b[i][j];

  printf("Matrix C:\n");  
  for(i=0; i<16; i++)
    printf("c[%1d][%1d]=%2d%c",i/4,i%4,
	   *(ca+i),i%4==3?'\n':' ');
}