/* power2.c -- Print out powers of 2: 1, 2, 4, 8, .. up to 2^N
 */

#include <stdio.h>
#define N 16

int main(void) {
  int n;           /* The current exponent */
  int val = 1;     /* The current power of 2  */

  printf("\t  n  \t    2^n\n");
  printf("\t================\n");
  for (n=0; n<=N; n++) {
    printf("\t%3d \t %6d\n", n, val); 
    val = 2*val;
  }
  return 0;
}

/* It prints out :

	  n  	    2^n
	================
	  0 	      1
	  1 	      2
	  2 	      4
	  3 	      8
	  4 	     16
	  5 	     32
	  6 	     64
	  7 	    128
	  8 	    256
	  9 	    512
	 10 	   1024
	 11 	   2048
	 12 	   4096
	 13 	   8192
	 14 	  16384
	 15 	  32768
	 16 	  65536

*/