user: 下面的汇编指令对应的C源代码是什么：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D12(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D65(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    -0x10(%rbp),%rsi
  lea    -0x14(%rbp),%rcx
  lea    -0x18(%rbp),%rdx
  lea    -0x1c(%rbp),%rax
  mov    %rsi,%r8
  mov    %rax,%rsi
  lea    D1(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  lea    D37(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    -0xc(%rbp),%rax
  mov    %rax,%rsi
  lea    D28(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  movss  -0xc(%rbp),%xmm0
  movss  -0x1c(%rbp),%xmm1
  comiss %xmm1,%xmm0
  jb     L85
  lea    D92(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  jmp    L75
L85:
  movss  -0xc(%rbp),%xmm1
  movss  -0x1c(%rbp),%xmm0
  comiss %xmm1,%xmm0
  jbe    L55
  movss  -0xc(%rbp),%xmm0
  movss  -0x18(%rbp),%xmm1
  comiss %xmm1,%xmm0
  jb     L55
  lea    D78(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  jmp    L75
L55:
  movss  -0xc(%rbp),%xmm1
  movss  -0x18(%rbp),%xmm0
  comiss %xmm1,%xmm0
  jbe    L103
  movss  -0xc(%rbp),%xmm0
  movss  -0x14(%rbp),%xmm1
  comiss %xmm1,%xmm0
  jb     L103
  lea    D38(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  jmp    L75
L103:
  movss  -0xc(%rbp),%xmm1
  movss  -0x14(%rbp),%xmm0
  comiss %xmm1,%xmm0
  jbe    L54
  movss  -0xc(%rbp),%xmm0
  movss  -0x10(%rbp),%xmm1
  comiss %xmm1,%xmm0
  jb     L54
  lea    D48(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  jmp    L75
L54:
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L75:
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L79
  call   <__stack_chk_fail@plt>
L79:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: tag: D12
data_type: string
name: extract_symbolic_data
arguments: tag: D65
data_type: string
name: extract_symbolic_data
arguments: tag: D1
data_type: string
name: extract_symbolic_data
arguments: tag: D37
data_type: string
name: extract_symbolic_data
arguments: tag: D28
data_type: string
name: extract_symbolic_data
arguments: tag: D92
data_type: string
name: extract_symbolic_data
arguments: tag: D78
data_type: string
name: extract_symbolic_data
arguments: tag: D38
data_type: string
name: extract_symbolic_data
arguments: tag: D48
data_type: string
name: extract_symbolic_data
arguments: tag: D11
data_type: string

tool: D12: Enter thresholds for A, B, C, D


tool: D65: in that order, decreasing percentages > 

tool: D1: %f%f%f%f

tool: D37: Thank you. Now enter student score (percent) >

tool: D28: %f

tool: D92: Student has an A grade


tool: D78: Student has an B grade


tool: D38: Student has an C grade


tool: D48: Student has an D grade


tool: D11: Student has failed the course


assistant: ```c
int main() {
  float A, B, C, D, score;
  printf("Enter thresholds for A, B, C, D\n");
  printf("in that order, decreasing percentages > ");
  scanf("%f%f%f%f", &A, &B, &C, &D);
  printf("Thank you. Now enter student score (percent) >");
  scanf("%f", &score);
  if (score >= A) {
    printf("Student has an A grade\n");
  } else if (score < A && score >= B) {
    printf("Student has an B grade\n");
  } else if (score < B && score >= C) {
    printf("Student has an C grade\n");
  } else if (score < C && score >= D) {
    printf("Student has an D grade\n");
  } else {
    printf("Student has failed the course\n");
  }
  return 0;
}
```