#include <library.h>

int power(const int a, const int b)
{ if (b == 0)
    return 1;
  const int prev = power(a, b-1);
  return prev * a; }

void table(const int val, const int last)
{ 
  // to print out a table of powers all the way from val to last:

  // if the table is to be empty, don't do anything

  if (val > last)
    return;

  // first print out the first line of the table
  //     val, 2 to the power of val, 10 to the power of val

  print(val);
  print("\t");
  print(power(2, val));
  print("\t");
  print(power(10, val));
  print("\n");

  // then do the same, but starting from the next value

  table(val+1, last); }

void main()
{ table(1, 100); }