#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 *);
int main(void) {
  int alga = 0, n;
  printf("Informe o número: ");
  scanf("%d", &n);
  if (n == 0)
    alga = 1;
  else
    while (n != 0) {
      alga++;
      n /= 10;
    }
  printf("%d algarismo(s)\n", alga);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0xc(%rbp)
jne    116a <main+0x4a>
movl   $0x1,-0x8(%rbp)
jmp    119a <main+0x7a>
jmp    116f <main+0x4f>
cmpl   $0x0,-0xc(%rbp)
je     1195 <main+0x75>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
jmp    116f <main+0x4f>
jmp    119a <main+0x7a>
mov    -0x8(%rbp),%esi
lea    0xe73(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%eax
test   %eax,%eax
je     1178 <main+0x58>
xchg   %ax,%ax
add    $0x1,%ebx
movslq %eax,%rcx
imul   $0x66666667,%rcx,%rax
mov    %rax,%rdx
shr    $0x3f,%rdx
sar    $0x22,%rax
add    %edx,%eax
add    $0x9,%ecx
cmp    $0x12,%ecx
ja     1150 <main+0x30>
mov    %eax,0xc(%rsp)
jmp    117d <main+0x5d>
mov    $0x1,%ebx
lea    0xe93(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [20 x i8] c"Informe o n\C3\BAmero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"%d algarismo(s)\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%6 = load i32, i32* %3
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %9
8: ; preds = %0
store i32 1, i32* %2
br label %19
9: ; preds = %0
br label %10
10: ; preds = %13, %9
%11 = load i32, i32* %3
%12 = icmp ne i32 %11, 0
br i1 %12, label %13, label %18
13: ; preds = %10
%14 = load i32, i32* %2
%15 = add nsw i32 %14, 1
store i32 %15, i32* %2
%16 = load i32, i32* %3
%17 = sdiv i32 %16, 10
store i32 %17, i32* %3
br label %10
18: ; preds = %10
br label %19
19: ; preds = %18, %8
%20 = load i32, i32* %2
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %20)
ret i32 0
}

LLVM IR (-O2):
@.str = [20 x i8] c"Informe o n\C3\BAmero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [17 x i8] c"%d algarismo(s)\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 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 = icmp eq i32 %5, 0
br i1 %6, label %15, label %7
7: ; preds = %0, %7
%8 = phi i32 [ %10, %7 ], [ 0, %0 ]
%9 = phi i32 [ %11, %7 ], [ %5, %0 ]
%10 = add nuw nsw i32 %8, 1
%11 = sdiv i32 %9, 10
%12 = add i32 %9, 9
%13 = icmp ult i32 %12, 19
br i1 %13, label %14, label %7
14: ; preds = %7
store i32 %11, i32* %1
br label %15
15: ; preds = %14, %0
%16 = phi i32 [ 1, %0 ], [ %10, %14 ]
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %16)
ret i32 0
}