#include <stdio.h> int main(){   int a[4][4];   int b = 0;   int x;   int y;    for (x = 0; x < 4; x++)   {      for (y = 0; y < 4; y++)      {         b++;         a[x][y] = b;      }   }    for (x = 0; x < 4; x++)   {      printf("x=%d: ", x);      for (y = 0; y < 4; y++)      {         printf("%d ", a[x][y]);      }      printf("\n");   }    return 0;} /* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/