#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(int argc, const char *argv[]) {
  int amount;
  int price;
  printf("请输入票面：");
  scanf("%d", &amount);
  printf("请输入金额：");
  scanf("%d", &price);
  int change = amount - price;
  printf("找您%d元\n", change);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xec2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb1(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x14(%rbp),%eax
sub    -0x18(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x1c(%rbp),%esi
lea    0xeab(%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    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed9(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xec8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
sub    0x8(%rsp),%esi
lea    0xeb8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E7\A5\A8\E9\9D\A2\EF\BC\9A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [19 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E9\87\91\E9\A2\9D\EF\BC\9A\00"
@.str.3 = [13 x i8] c"\E6\89\BE\E6\82\A8%d\E5\85\83\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
store i32 %0, i32* %3
store i8** %1, i8*** %4
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %5)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %6)
%12 = load i32, i32* %5
%13 = load i32, i32* %6
%14 = sub nsw i32 %12, %13
store i32 %14, i32* %7
%15 = load i32, i32* %7
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), i32 %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E7\A5\A8\E9\9D\A2\EF\BC\9A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [19 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E9\87\91\E9\A2\9D\EF\BC\9A\00"
@.str.3 = [13 x i8] c"\E6\89\BE\E6\82\A8%d\E5\85\83\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %3 to i8*
%6 = bitcast i32* %4 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = sub nsw i32 %11, %12
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), i32 %13)
ret i32 0
}