#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 *, int *);
int main() {
  int a, b, c, max;
  printf("请输入三个整数：\n");
  scanf("%d %d %d", &a, &b, &c);
  if (a > b) {
    max = a;
  } else {
    max = b;
  }
  if (c > max) {
    max = c;
  }
  printf("最大数为：%d\n", max);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jle    116c <main+0x4c>
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
jmp    1172 <main+0x52>
mov    -0xc(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0x14(%rbp),%eax
jle    1184 <main+0x64>
mov    -0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%esi
lea    0xe95(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xee1(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb9(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
call   1050 <scanf@plt>
mov    0x14(%rsp),%eax
mov    0x10(%rsp),%esi
cmp    %esi,%eax
cmovg  %eax,%esi
mov    0xc(%rsp),%eax
cmp    %esi,%eax
cmovg  %eax,%esi
lea    0xe91(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [26 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E4\B8\89\E4\B8\AA\E6\95\B4\E6\95\B0\EF\BC\9A\0A\00"
@.str.1 = [9 x i8] c"%d %d %d\00"
@.str.2 = [19 x i8] c"\E6\9C\80\E5\A4\A7\E6\95\B0\E4\B8\BA\EF\BC\9A%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3, i32* %4)
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = icmp sgt i32 %8, %9
br i1 %10, label %11, label %13
11: ; preds = %0
%12 = load i32, i32* %2
store i32 %12, i32* %5
br label %15
13: ; preds = %0
%14 = load i32, i32* %3
store i32 %14, i32* %5
br label %15
15: ; preds = %13, %11
%16 = load i32, i32* %4
%17 = load i32, i32* %5
%18 = icmp sgt i32 %16, %17
br i1 %18, label %19, label %21
19: ; preds = %15
%20 = load i32, i32* %4
store i32 %20, i32* %5
br label %21
21: ; preds = %19, %15
%22 = load i32, i32* %5
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %22)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [9 x i8] c"%d %d %d\00"
@.str.2 = [19 x i8] c"\E6\9C\80\E5\A4\A7\E6\95\B0\E4\B8\BA\EF\BC\9A%d\0A\00"
@str = [25 x i8] c"\E8\AF\B7\E8\BE\93\E5\85\A5\E4\B8\89\E4\B8\AA\E6\95\B4\E6\95\B0\EF\BC\9A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = bitcast i32* %1 to i8*
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2, i32* %3)
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = icmp sgt i32 %9, %10
%12 = select i1 %11, i32 %9, i32 %10
%13 = load i32, i32* %3
%14 = icmp sgt i32 %13, %12
%15 = select i1 %14, i32 %13, i32 %12
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %15)
ret i32 0
}