/*
Compile the following program to assembly with

gcc -S power2.c

This gives file power2.s, which is assembly in GAS format.  Show me the code.

If the code refers to 64 bit registers (e.g. %rax instead of %eax),
try compiling with gcc -m32 -S power2.c
*/


#include<stdio.h>

int main()
{
  int n, m;
  printf("enter number: ");
  scanf("%d",&n);
  m = n; // copy
  int ax = 1;
  while (n>0)
    {
      ax = ax * 2;
      n=n-1;
    }
  printf("the %dth power of 2 is %d\n",m,ax);
  return 0;
}