#include <stdio.h>
#define COLS 5

typedef int RowArray[COLS];
RowArray *rptr;

int main(void)
{
  int nrows = 10;
  int row, col;
  rptr = malloc(nrows * COLS * sizeof(int))
  for(row = 0; row < nrows; row++)
   for(col = 0; col < COLS; col++)
   {
     rptr[row][col] = 17;
   }
}
.