#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 *, char *, int);
int /*<<< orphan*/ scanf(char *, ...);
int main(void) {
  char name[100];
  int yob, current_year, age;
  scanf("%[^\n]", name);
  scanf("%d", &yob);
  scanf("%d", &current_year);
  age = current_year - yob;
  printf("%s is %d years old.\n", name, age);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x80,%rsp
lea    -0x70(%rbp),%rsi
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1040 <scanf@plt>
lea    0xec2(%rip),%rdi
lea    -0x74(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
lea    0xeb0(%rip),%rdi
lea    -0x78(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
mov    -0x78(%rbp),%eax
sub    -0x74(%rbp),%eax
mov    %eax,-0x7c(%rbp)
lea    -0x70(%rbp),%rsi
mov    -0x7c(%rbp),%edx
lea    0xe91(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x80,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x78,%rsp
lea    0xed2(%rip),%rdi
lea    0x10(%rsp),%r14
mov    %r14,%rsi
xor    %eax,%eax
call   1040 <scanf@plt>
lea    0xec2(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <scanf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <scanf@plt>
mov    0x8(%rsp),%edx
sub    0xc(%rsp),%edx
lea    0xe98(%rip),%rdi
mov    %r14,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x78,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [6 x i8] c"%[^\0A]\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [21 x i8] c"%s is %d years old.\0A\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%6 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8* %5)
%7 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%9 = load i32, i32* %3
%10 = load i32, i32* %2
%11 = sub nsw i32 %9, %10
store i32 %11, i32* %4
%12 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%13 = load i32, i32* %4
%14 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i8* %12, i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [6 x i8] c"%[^\0A]\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [21 x i8] c"%s is %d years old.\0A\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca i32
%3 = alloca i32
%4 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8* %4)
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%10 = load i32, i32* %3
%11 = load i32, i32* %2
%12 = sub nsw i32 %10, %11
%13 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i8* %4, i32 %12)
ret i32 0
}