#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 input;
  printf("Enter 1 no.: ");
  scanf("%d", &input);
  if (input % 2 == 0) {
    printf("It's an even no\n");
  } else if (input % 2 != 0) {
    printf("It's an odd no\n");
  } else {
    printf("this is an invalid input . . .\nPlease Run again . . .");
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
lea    0xed3(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x4(%rbp),%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1169 <main+0x49>
lea    0xeb2(%rip),%rdi
call   1030 <printf@plt>
jmp    119f <main+0x7f>
mov    -0x4(%rbp),%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     118e <main+0x6e>
lea    0xe9e(%rip),%rdi
call   1030 <printf@plt>
jmp    119a <main+0x7a>
lea    0xe9d(%rip),%rdi
call   1030 <printf@plt>
jmp    119f <main+0x7f>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
lea    0xeca(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
testb  $0x1,0x4(%rsp)
lea    0xec6(%rip),%rax
lea    0xeb0(%rip),%rdi
cmove  %rax,%rdi
call   1030 <puts@plt>
pop    %rax
ret

LLVM IR (-O0):
@.str = [14 x i8] c"Enter 1 no.: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"It's an even no\0A\00"
@.str.3 = [16 x i8] c"It's an odd no\0A\00"
@.str.4 = [54 x i8] c"this is an invalid input . . .\0APlease Run again . . .\00"
define void @main() {
%1 = alloca i32
%2 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%4 = load i32, i32* %1
%5 = srem i32 %4, 2
%6 = icmp eq i32 %5, 0
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0))
br label %18
9: ; preds = %0
%10 = load i32, i32* %1
%11 = srem i32 %10, 2
%12 = icmp ne i32 %11, 0
br i1 %12, label %13, label %15
13: ; preds = %9
%14 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
br label %17
15: ; preds = %9
%16 = call i32 @printf(i8* getelementptr inbounds ([54 x i8], [54 x i8]* @.str.4, i64 0, i64 0))
br label %17
17: ; preds = %15, %13
br label %18
18: ; preds = %17, %7
ret void
}

LLVM IR (-O2):
@.str = [14 x i8] c"Enter 1 no.: \00"
@.str.1 = [3 x i8] c"%d\00"
@str = [15 x i8] c"It's an odd no\00"
@str.5 = [16 x i8] c"It's an even no\00"
define void @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 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 = and i32 %5, 1
%7 = icmp eq i32 %6, 0
%8 = select i1 %7, i8* getelementptr inbounds ([16 x i8], [16 x i8]* @str.5, i64 0, i64 0), i8* getelementptr inbounds ([15 x i8], [15 x i8]* @str, i64 0, i64 0)
%9 = call i32 @puts(i8* dereferenceable(1) %8)
ret void
}