#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 number, x;
  int count = 0;
  printf("Enter a number: ");
  scanf_s("%d", &number);
  while (number > 0) {
    x = number % 10;
    printf("%d\t", x);
    count++;
    number = number / 10;
  }
  printf("\n");
  printf("Number of digits is : %d", count);
  printf("\n");
  system("pause");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xed2(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf_s@plt>
cmpl   $0x0,-0x8(%rbp)
jle    11a9 <main+0x79>
mov    -0x8(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0xc(%rbp)
mov    -0xc(%rbp),%esi
lea    0xe8b(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x8(%rbp)
jmp    1164 <main+0x34>
lea    0xe65(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x10(%rbp),%esi
lea    0xe56(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe46(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe53(%rip),%rdi
call   1030 <system@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xeb0(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf_s@plt>
mov    0xc(%rsp),%esi
test   %esi,%esi
jle    11d1 <main+0x91>
mov    $0xcccccccd,%r15d
lea    0xe92(%rip),%r14
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %esi,%eax
imul   %r15,%rax
shr    $0x23,%rax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%ebx
movslq 0xc(%rsp),%rax
imul   $0x66666667,%rax,%rsi
mov    %rsi,%rcx
shr    $0x3f,%rcx
sar    $0x22,%rsi
add    %ecx,%esi
mov    %esi,0xc(%rsp)
cmp    $0x9,%rax
jg     1190 <main+0x50>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xe33(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xe32(%rip),%rdi
call   1040 <system@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\09\00"
@.str.3 = [2 x i8] c"\0A\00"
@.str.4 = [25 x i8] c"Number of digits is : %d\00"
@.str.5 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
br label %7
7: ; preds = %10, %0
%8 = load i32, i32* %2
%9 = icmp sgt i32 %8, 0
br i1 %9, label %10, label %19
10: ; preds = %7
%11 = load i32, i32* %2
%12 = srem i32 %11, 10
store i32 %12, i32* %3
%13 = load i32, i32* %3
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %13)
%15 = load i32, i32* %4
%16 = add nsw i32 %15, 1
store i32 %16, i32* %4
%17 = load i32, i32* %2
%18 = sdiv i32 %17, 10
store i32 %18, i32* %2
br label %7
19: ; preds = %7
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%21 = load i32, i32* %4
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.4, i64 0, i64 0), i32 %21)
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%24 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
%25 = load i32, i32* %1
ret i32 %25
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\09\00"
@.str.4 = [25 x i8] c"Number of digits is : %d\00"
@.str.5 = [6 x i8] c"pause\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_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 sgt i32 %5, 0
br i1 %6, label %7, label %16
7: ; preds = %0, %7
%8 = phi i32 [ %12, %7 ], [ 0, %0 ]
%9 = phi i32 [ %14, %7 ], [ %5, %0 ]
%10 = urem i32 %9, 10
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %10)
%12 = add nuw nsw i32 %8, 1
%13 = load i32, i32* %1
%14 = sdiv i32 %13, 10
store i32 %14, i32* %1
%15 = icmp sgt i32 %13, 9
br i1 %15, label %7, label %16
16: ; preds = %7, %0
%17 = phi i32 [ 0, %0 ], [ %12, %7 ]
%18 = call i32 @putchar(i32 10)
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.4, i64 0, i64 0), i32 %17)
%20 = call i32 @putchar(i32 10)
%21 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}