/* assemby for 2**n, with n in ecx and eax as accumulator */

.section	.rodata
STR0:	.string "the answer is %d\n"
STR1:	.string "%d"
		
.global main

main:
	/* scanf("%d",&a)  */
	
	sub $4,%esp
	mov %esp,%eax
	push %eax
	push $STR1
	call scanf
	add $8,%esp
	pop %ecx	
/*	mov $8,%ecx */
	mov $1, %eax
loop:
	cmp $0,%ecx
	jle endloop
	imul $2,%eax
	dec %ecx
	jmp loop
endloop:	
	push %eax
	push $STR0
	call printf
	add $8,%esp
	push $0
	call exit