#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 bin2dec(int);
int dec2bin(int);
int /*<<< orphan*/ getch();
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int a;
  printf("Enter a number: ");
  scanf("%d", &a);
  printf("%d in binary: %d", a, dec2bin(a));
  printf("\n%d in decimal: %d", dec2bin(a), bin2dec(dec2bin(a)));
  getch();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xebe(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%edi
call   1070 <dec2bin@plt>
mov    -0x10(%rbp),%esi
mov    %eax,%edx
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
call   1070 <dec2bin@plt>
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1070 <dec2bin@plt>
mov    %eax,%edi
call   1030 <bin2dec@plt>
mov    -0xc(%rbp),%esi
mov    %eax,%edx
lea    0xe5e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1060 <getch@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xea4(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xec8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%ebx
mov    %ebx,%edi
call   1070 <dec2bin@plt>
lea    0xe8b(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    0xc(%rsp),%edi
call   1070 <dec2bin@plt>
mov    %eax,%ebx
mov    0xc(%rsp),%edi
call   1070 <dec2bin@plt>
mov    %eax,%edi
call   1030 <bin2dec@plt>
lea    0xe6f(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
call   1060 <getch@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"%d in binary: %d\00"
@.str.3 = [19 x i8] c"\0A%d in decimal: %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%5 = load i32, i32* %2
%6 = load i32, i32* %2
%7 = call i32 @dec2bin(i32 %6)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %5, i32 %7)
%9 = load i32, i32* %2
%10 = call i32 @dec2bin(i32 %9)
%11 = load i32, i32* %2
%12 = call i32 @dec2bin(i32 %11)
%13 = call i32 @bin2dec(i32 %12)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i32 %10, i32 %13)
%15 = call i32 (...) @getch()
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"%d in binary: %d\00"
@.str.3 = [19 x i8] c"\0A%d in decimal: %d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = call i32 @dec2bin(i32 %5)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %5, i32 %6)
%8 = load i32, i32* %1
%9 = call i32 @dec2bin(i32 %8)
%10 = load i32, i32* %1
%11 = call i32 @dec2bin(i32 %10)
%12 = call i32 @bin2dec(i32 %11)
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i32 %9, i32 %12)
%14 = call i32 (...) @getch()
ret i32 0
}