#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 /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
void main() {
  int a, n1, n2, n3, swap;
  printf("Enter a three digit number\n");
  scanf("%d", &a);
  n1 = a % 10;
  n2 = (a / 100) % 10;
  n3 = (a / 10) % 10;
  swap = n1;
  n1 = n2;
  n2 = swap;
  printf("Required number is:%d%d%d\n", n2, n3, n1);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xedf(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x4(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x8(%rbp)
mov    -0x4(%rbp),%eax
mov    $0x64,%ecx
cltd
idiv   %ecx
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0xc(%rbp)
mov    -0x4(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x10(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0xc(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    -0x8(%rbp),%ecx
lea    0xe7d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xee6(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
movslq 0x4(%rsp),%rsi
imul   $0x51eb851f,%rsi,%rax
mov    %rax,%rcx
shr    $0x3f,%rcx
sar    $0x25,%rax
add    %ecx,%eax
movslq %eax,%rcx
imul   $0x66666667,%rcx,%rax
mov    %rax,%rdx
shr    $0x3f,%rdx
sar    $0x22,%rax
add    %edx,%eax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%ecx
imul   $0x66666667,%rsi,%rax
mov    %rax,%rdx
shr    $0x3f,%rdx
sar    $0x22,%rax
add    %edx,%eax
lea    (%rax,%rax,1),%edx
lea    (%rdx,%rdx,4),%edx
sub    %edx,%esi
movslq %eax,%rdx
imul   $0x66666667,%rdx,%rax
mov    %rax,%rdi
shr    $0x3f,%rdi
sar    $0x22,%rax
add    %edi,%eax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%edx
lea    0xe3d(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
pop    %rax
ret

LLVM IR (-O0):
@.str = [28 x i8] c"Enter a three digit number\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [27 x i8] c"Required number is:%d%d%d\0A\00"
define void @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%8 = load i32, i32* %1
%9 = srem i32 %8, 10
store i32 %9, i32* %2
%10 = load i32, i32* %1
%11 = sdiv i32 %10, 100
%12 = srem i32 %11, 10
store i32 %12, i32* %3
%13 = load i32, i32* %1
%14 = sdiv i32 %13, 10
%15 = srem i32 %14, 10
store i32 %15, i32* %4
%16 = load i32, i32* %2
store i32 %16, i32* %5
%17 = load i32, i32* %3
store i32 %17, i32* %2
%18 = load i32, i32* %5
store i32 %18, i32* %3
%19 = load i32, i32* %3
%20 = load i32, i32* %4
%21 = load i32, i32* %2
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0), i32 %19, i32 %20, i32 %21)
ret void
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [27 x i8] c"Required number is:%d%d%d\0A\00"
@str = [27 x i8] c"Enter a three digit number\00"
define void @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 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 = srem i32 %5, 10
%7 = sdiv i32 %5, 100
%8 = srem i32 %7, 10
%9 = sdiv i32 %5, 10
%10 = srem i32 %9, 10
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0), i32 %6, i32 %10, i32 %8)
ret void
}