#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_s(char *, int *);
int /*<<< orphan*/ system(char *);
main() {
  int a;
  printf("Enter a number: ");
  scanf_s("%d", &a);
  if (a == 0) {
    printf("Zero number\n\n");
  } else {
    if (a > 0) {
      printf("Positive number\n\n");
    } else {
      printf("Negative number\n\n");
    }
  }
  system("pause");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1040 <printf@plt>
lea    0xebf(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf_s@plt>
cmpl   $0x0,-0x8(%rbp)
jne    1176 <main+0x46>
lea    0xea8(%rip),%rdi
call   1040 <printf@plt>
jmp    11a2 <main+0x72>
cmpl   $0x0,-0x8(%rbp)
jle    1191 <main+0x61>
lea    0xe9b(%rip),%rdi
call   1040 <printf@plt>
jmp    119d <main+0x6d>
lea    0xe9c(%rip),%rdi
call   1040 <printf@plt>
jmp    11a2 <main+0x72>
lea    0xe9d(%rip),%rdi
call   1030 <system@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xeb8(%rip),%rdi
call   1050 <printf@plt>
lea    0xebd(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf_s@plt>
cmpl   $0x0,0x4(%rsp)
lea    0xec1(%rip),%rax
lea    0xea9(%rip),%rcx
cmovg  %rax,%rcx
lea    0xec0(%rip),%rdi
cmovne %rcx,%rdi
call   1030 <puts@plt>
lea    0xe88(%rip),%rdi
call   1040 <system@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [14 x i8] c"Zero number\0A\0A\00"
@.str.3 = [18 x i8] c"Positive number\0A\0A\00"
@.str.4 = [18 x i8] c"Negative number\0A\0A\00"
@.str.5 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%5 = load i32, i32* %2
%6 = icmp eq i32 %5, 0
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
br label %17
9: ; preds = %0
%10 = load i32, i32* %2
%11 = icmp sgt i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %9
%13 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.3, i64 0, i64 0))
br label %16
14: ; preds = %9
%15 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0))
br label %16
16: ; preds = %14, %12
br label %17
17: ; preds = %16, %7
%18 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
%19 = load i32, i32* %1
ret i32 %19
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.5 = [6 x i8] c"pause\00"
@str = [17 x i8] c"Negative number\0A\00"
@str.6 = [17 x i8] c"Positive number\0A\00"
@str.7 = [13 x i8] c"Zero number\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp eq i32 %5, 0
%7 = icmp sgt i32 %5, 0
%8 = select i1 %7, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @str.6, i64 0, i64 0), i8* getelementptr inbounds ([17 x i8], [17 x i8]* @str, i64 0, i64 0)
%9 = select i1 %6, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @str.7, i64 0, i64 0), i8* %8
%10 = call i32 @puts(i8* dereferenceable(1) %9)
%11 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}