user: 下面的汇编指令对应的C源代码是什么：

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0x40,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  lea    D63(%rip),%rdi
  call   <puts@plt>
  lea    D76(%rip),%rdi
  call   <puts@plt>
  lea    0x8(%rsp),%rsi
  lea    D40(%rip),%rdi
  call   <scanf@plt>
  cmp    $0x1,%eax
  je     L10
  lea    D92(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%ebx
L18:
  mov    0x38(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L23
  mov    %ebx,%eax
  add    $0x40,%rsp
  pop    %rbx
  ret
L10:
  mov    %eax,%ebx
  lea    0x10(%rsp),%rsi
  lea    D40(%rip),%rdi
  call   <scanf@plt>
  cmp    $0x1,%eax
  je     L0
  lea    D92(%rip),%rdi
  call   <puts@plt>
  jmp    L18
L0:
  lea    0x20(%rsp),%rcx
  lea    0x18(%rsp),%rdx
  lea    0x30(%rsp),%rsi
  lea    0x28(%rsp),%rdi
  movsd  D89(%rip),%xmm1
  movapd %xmm1,%xmm0
  mulsd  0x8(%rsp),%xmm0
  mulsd  0x10(%rsp),%xmm1
  call   <exactJ@plt>
  mov    %eax,%esi
  lea    D68(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movsd  D27(%rip),%xmm1
  mulsd  0x30(%rsp),%xmm1
  divsd  D38(%rip),%xmm1
  movsd  0x28(%rsp),%xmm0
  lea    D134(%rip),%rdi
  mov    $0x2,%eax
  call   <printf@plt>
  movsd  D38(%rip),%xmm0
  mulsd  0x18(%rsp),%xmm0
  movsd  D38(%rip),%xmm1
  mulsd  0x20(%rsp),%xmm1
  lea    D118(%rip),%rdi
  mov    $0x2,%eax
  call   <printf@plt>
  mov    $0x0,%ebx
  jmp    L18
L23:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D63
datatype: string
name: retrieve_data
arguments: data_label: D76
datatype: string
name: retrieve_data
arguments: data_label: D40
datatype: string
name: retrieve_data
arguments: data_label: D92
datatype: string
name: retrieve_data
arguments: data_label: D89
datatype: f64
name: retrieve_data
arguments: data_label: D68
datatype: string
name: retrieve_data
arguments: data_label: D27
datatype: byte[8]
name: retrieve_data
arguments: data_label: D38
datatype: f64
name: retrieve_data
arguments: data_label: D134
datatype: string
name: retrieve_data
arguments: data_label: D118
datatype: string

tool: D63: Enter  x, y  separated by space (or newline);

tool: D76:     (units: km, km; e.g. 100 100):

tool: D40: %lf

tool: D92: ... input error; exiting

tool: D89: 1000

tool: D68: 
Results from Test J (returned %d):


tool: {"D27": [0x8d,0xed,0xb5,0xa0,0xf7,0xc6,0xb0,0x3e]}

tool: D38: 31556926

tool: D134:   H   = %10.3f (m)     nu    = %10.3f (MPa a)


tool: D118:   u   = %10.5f (m/a)   v     = %10.5f (m/a)


assistant: ```c
int main() {
  double x, y, u, v, H, nu;
  int scanret;
  const double secpera = 31556926.0;
  printf("Enter  x, y  separated by space (or newline);\n");
  printf("    (units: km, km; e.g. 100 100):\n");
  scanret = scanf("%lf", &x);
  if (scanret != 1) {
    printf("... input error; exiting\n");
    return 1;
  }
  scanret = scanf("%lf", &y);
  if (scanret != 1) {
    printf("... input error; exiting\n");
    return 1;
  }
  printf("\nResults from Test J (returned %d):\n", exactJ(x * 1000.0, y * 1000.0, &H, &nu, &u, &v));
  printf("  H   = %10.3f (m)     nu    = %10.3f (MPa a)\n", H, (nu * 1.0e-6) / secpera);
  printf("  u   = %10.5f (m/a)   v     = %10.5f (m/a)\n", u * secpera, v * secpera);
  return 0;
}
```