#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int power(double, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, ...);
int main(void) {
  double a;
  int n;
  printf("Enter a number: ");
  scanf("%lf", &a);
  printf("Enter the power: ");
  scanf("%d", &n);
  int ans = power(a, n);
  printf("The answer is %d.\n", ans);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xebd(%rip),%rdi
lea    -0x10(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeb3(%rip),%rdi
lea    -0x14(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
mov    -0x14(%rbp),%edi
call   1030 <power@plt>
mov    %eax,-0x18(%rbp)
mov    -0x18(%rbp),%esi
lea    0xe91(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xec8(%rip),%rdi
lea    0x10(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
lea    0xeb9(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xebd(%rip),%rdi
lea    0xc(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
movsd  0x10(%rsp),%xmm0
mov    0xc(%rsp),%edi
call   1030 <power@plt>
lea    0xe9e(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [18 x i8] c"Enter the power: \00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [19 x i8] c"The answer is %d.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%6 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %3)
%9 = load double, double* %2
%10 = load i32, i32* %3
%11 = call i32 @power(double %9, i32 %10)
store i32 %11, i32* %4
%12 = load i32, i32* %4
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.4, i64 0, i64 0), i32 %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [18 x i8] c"Enter the power: \00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [19 x i8] c"The answer is %d.\0A\00"
define i32 @main() {
%1 = alloca double
%2 = alloca i32
%3 = bitcast double* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%6 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %1)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %2)
%9 = load double, double* %1
%10 = load i32, i32* %2
%11 = call i32 @power(double %9, i32 %10)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.4, i64 0, i64 0), i32 %11)
ret i32 0
}