#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*/ clear_kb();
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, ...);
int main(void) {
  int age;
  char name[20];
  printf("Enter your age: ");
  scanf("%d", &age);
  clear_kb();
  printf("Enter your first name: ");
  scanf("%s", name);
  printf("Your age is: %d.\n", age);
  printf("Your name is: %s.\n", name);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebd(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
mov    $0x0,%al
call   1050 <clear_kb@plt>
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x20(%rbp),%rsi
lea    0xead(%rip),%rdi
mov    $0x0,%al
call   1040 <scanf@plt>
mov    -0x8(%rbp),%esi
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x20(%rbp),%rsi
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
lea    0xc(%rsp),%rsi
xor    %eax,%eax
call   1040 <scanf@plt>
xor    %eax,%eax
call   1050 <clear_kb@plt>
lea    0xeb0(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeba(%rip),%rdi
lea    0x10(%rsp),%rbx
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
lea    0xea3(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xea7(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Enter your age: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [24 x i8] c"Enter your first name: \00"
@.str.3 = [3 x i8] c"%s\00"
@.str.4 = [18 x i8] c"Your age is: %d.\0A\00"
@.str.5 = [19 x i8] c"Your name is: %s.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca [20 x i8]
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%5 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = call i32 (...) @clear_kb()
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
%8 = getelementptr inbounds [20 x i8], [20 x i8]* %3, i64 0, i64 0
%9 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %8)
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %10)
%12 = getelementptr inbounds [20 x i8], [20 x i8]* %3, i64 0, i64 0
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i8* %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"Enter your age: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [24 x i8] c"Enter your first name: \00"
@.str.3 = [3 x i8] c"%s\00"
@.str.4 = [18 x i8] c"Your age is: %d.\0A\00"
@.str.5 = [19 x i8] c"Your name is: %s.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [20 x i8]
%3 = bitcast i32* %1 to i8*
%4 = getelementptr inbounds [20 x i8], [20 x i8]* %2, i64 0, i64 0
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%6 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%7 = call i32 (...) @clear_kb()
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %4)
%10 = load i32, i32* %1
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %10)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i8* %4)
ret i32 0
}