#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 shuzi1 = 1, shuzi2 = 0;
  printf("please input a num:");
  scanf("%d", &shuzi2);
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  printf("%d X %d = %d\n", shuzi1, shuzi2, shuzi1 * shuzi2);
  shuzi1 = shuzi1 + 1;
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec2(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xea8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xe84(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xe60(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xe3c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xe18(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xdf4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xdd0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xdac(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xd88(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
imul   -0xc(%rbp),%ecx
lea    0xd64(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
movl   $0x0,0xc(%rsp)
lea    0xecc(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed2(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%ecx
lea    0xec0(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
mov    %ecx,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,1),%ecx
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,2),%ecx
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    0x0(,%rdx,4),%ecx
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,4),%ecx
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,1),%eax
lea    (%rax,%rax,2),%ecx
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    0x0(,%rdx,8),%ecx
sub    %edx,%ecx
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    0x0(,%rdx,8),%ecx
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,8),%ecx
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    (%rdx,%rdx,1),%eax
lea    (%rax,%rax,4),%ecx
mov    %rbx,%rdi
mov    $0xa,%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"please input a num:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [14 x i8] c"%d X %d = %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %2
store i32 0, i32* %3
%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* %2
%7 = load i32, i32* %3
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = mul nsw i32 %8, %9
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %6, i32 %7, i32 %10)
%12 = load i32, i32* %2
%13 = add nsw i32 %12, 1
store i32 %13, i32* %2
%14 = load i32, i32* %2
%15 = load i32, i32* %3
%16 = load i32, i32* %2
%17 = load i32, i32* %3
%18 = mul nsw i32 %16, %17
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %14, i32 %15, i32 %18)
%20 = load i32, i32* %2
%21 = add nsw i32 %20, 1
store i32 %21, i32* %2
%22 = load i32, i32* %2
%23 = load i32, i32* %3
%24 = load i32, i32* %2
%25 = load i32, i32* %3
%26 = mul nsw i32 %24, %25
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %22, i32 %23, i32 %26)
%28 = load i32, i32* %2
%29 = add nsw i32 %28, 1
store i32 %29, i32* %2
%30 = load i32, i32* %2
%31 = load i32, i32* %3
%32 = load i32, i32* %2
%33 = load i32, i32* %3
%34 = mul nsw i32 %32, %33
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %30, i32 %31, i32 %34)
%36 = load i32, i32* %2
%37 = add nsw i32 %36, 1
store i32 %37, i32* %2
%38 = load i32, i32* %2
%39 = load i32, i32* %3
%40 = load i32, i32* %2
%41 = load i32, i32* %3
%42 = mul nsw i32 %40, %41
%43 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %38, i32 %39, i32 %42)
%44 = load i32, i32* %2
%45 = add nsw i32 %44, 1
store i32 %45, i32* %2
%46 = load i32, i32* %2
%47 = load i32, i32* %3
%48 = load i32, i32* %2
%49 = load i32, i32* %3
%50 = mul nsw i32 %48, %49
%51 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %46, i32 %47, i32 %50)
%52 = load i32, i32* %2
%53 = add nsw i32 %52, 1
store i32 %53, i32* %2
%54 = load i32, i32* %2
%55 = load i32, i32* %3
%56 = load i32, i32* %2
%57 = load i32, i32* %3
%58 = mul nsw i32 %56, %57
%59 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %54, i32 %55, i32 %58)
%60 = load i32, i32* %2
%61 = add nsw i32 %60, 1
store i32 %61, i32* %2
%62 = load i32, i32* %2
%63 = load i32, i32* %3
%64 = load i32, i32* %2
%65 = load i32, i32* %3
%66 = mul nsw i32 %64, %65
%67 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %62, i32 %63, i32 %66)
%68 = load i32, i32* %2
%69 = add nsw i32 %68, 1
store i32 %69, i32* %2
%70 = load i32, i32* %2
%71 = load i32, i32* %3
%72 = load i32, i32* %2
%73 = load i32, i32* %3
%74 = mul nsw i32 %72, %73
%75 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %70, i32 %71, i32 %74)
%76 = load i32, i32* %2
%77 = add nsw i32 %76, 1
store i32 %77, i32* %2
%78 = load i32, i32* %2
%79 = load i32, i32* %3
%80 = load i32, i32* %2
%81 = load i32, i32* %3
%82 = mul nsw i32 %80, %81
%83 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %78, i32 %79, i32 %82)
%84 = load i32, i32* %2
%85 = add nsw i32 %84, 1
store i32 %85, i32* %2
ret i32 0
}

LLVM IR (-O2):
@.str = [20 x i8] c"please input a num:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [14 x i8] c"%d X %d = %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%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 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 1, i32 %5, i32 %5)
%7 = load i32, i32* %1
%8 = shl nsw i32 %7, 1
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 2, i32 %7, i32 %8)
%10 = load i32, i32* %1
%11 = mul nsw i32 %10, 3
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 3, i32 %10, i32 %11)
%13 = load i32, i32* %1
%14 = shl nsw i32 %13, 2
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 4, i32 %13, i32 %14)
%16 = load i32, i32* %1
%17 = mul nsw i32 %16, 5
%18 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 5, i32 %16, i32 %17)
%19 = load i32, i32* %1
%20 = mul nsw i32 %19, 6
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 6, i32 %19, i32 %20)
%22 = load i32, i32* %1
%23 = mul nsw i32 %22, 7
%24 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 7, i32 %22, i32 %23)
%25 = load i32, i32* %1
%26 = shl nsw i32 %25, 3
%27 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 8, i32 %25, i32 %26)
%28 = load i32, i32* %1
%29 = mul nsw i32 %28, 9
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 9, i32 %28, i32 %29)
%31 = load i32, i32* %1
%32 = mul nsw i32 %31, 10
%33 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 10, i32 %31, i32 %32)
ret i32 0
}