user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r15
  lea    D42(%rip),%r15
  push   %r14
  lea    D155(%rip),%r14
  push   %r13
  lea    D33(%rip),%r13
  push   %r12
  lea    D9(%rip),%r12
  push   %rbp
  lea    D97(%rip),%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    0xc(%rsp),%rbx
  movl   $0x0,0xc(%rsp)
  jmp    L69
  nopl   0x0(%rax)
L23:
  test   %eax,%eax
  je     L7
  lea    D145(%rip),%rdi
  call   <puts@plt>
L62:
  xor    %eax,%eax
  call   <_getch@plt>
  mov    0xc(%rsp),%eax
  test   %eax,%eax
  je     L20
L69:
  mov    %r15,%rdi
  call   <system@plt>
  mov    %r14,%rdi
  call   <puts@plt>
  mov    %r13,%rdi
  call   <puts@plt>
  mov    %r12,%rdi
  call   <puts@plt>
  mov    %rbp,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    %rbx,%rsi
  lea    D80(%rip),%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  mov    0xc(%rsp),%eax
  cmp    $0x1,%eax
  je     L21
  cmp    $0x2,%eax
  jne    L23
  lea    D100(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    0x14(%rsp),%rsi
  lea    D93(%rip),%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  movss  0x14(%rsp),%xmm0
  mov    $0x1,%eax
  subss  D81(%rip),%xmm0
  lea    D78(%rip),%rdi
  mulss  D21(%rip),%xmm0
  divss  D102(%rip),%xmm0
  cvtss2sd %xmm0,%xmm0
  call   <printf@plt>
  xor    %eax,%eax
  call   <_getch@plt>
  mov    0xc(%rsp),%eax
  test   %eax,%eax
  jne    L69
L20:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L41
  add    $0x28,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L7:
  xor    %edi,%edi
  call   <exit@plt>
L21:
  lea    D154(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    0x10(%rsp),%rsi
  lea    D93(%rip),%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  pxor   %xmm1,%xmm1
  mov    $0x1,%eax
  movsd  D41(%rip),%xmm0
  cvtss2sd 0x10(%rsp),%xmm1
  lea    D53(%rip),%rdi
  mulsd  %xmm1,%xmm0
  mulsd  %xmm1,%xmm0
  cvtsd2ss %xmm0,%xmm0
  cvtss2sd %xmm0,%xmm0
  call   <printf@plt>
  jmp    L62
L41:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: label: D42
data_type: string
name: extract_symbolic_data
arguments: label: D155
data_type: string
name: extract_symbolic_data
arguments: label: D33
data_type: string
name: extract_symbolic_data
arguments: label: D9
data_type: string
name: extract_symbolic_data
arguments: label: D97
data_type: string
name: extract_symbolic_data
arguments: label: D145
data_type: string
name: extract_symbolic_data
arguments: label: D80
data_type: string
name: extract_symbolic_data
arguments: label: D100
data_type: string
name: extract_symbolic_data
arguments: label: D93
data_type: string
name: extract_symbolic_data
arguments: label: D81
data_type: byte[4]
name: extract_symbolic_data
arguments: label: D78
data_type: string
name: extract_symbolic_data
arguments: label: D21
data_type: byte[4]
name: extract_symbolic_data
arguments: label: D102
data_type: byte[4]
name: extract_symbolic_data
arguments: label: D154
data_type: string
name: extract_symbolic_data
arguments: label: D41
data_type: f64
name: extract_symbolic_data
arguments: label: D53
data_type: string

tool: D42: cls

tool: D155: 0-Exit

tool: D33: 1-Area

tool: D9: 2-Temp

tool: D97: please choose : 

tool: D145: error

tool: D80: %d

tool: D100: enter tf 

tool: D93: %f

tool: {"D81": [0x00,0x00,0x00,0x42]}

tool: D78: 
tc is %f 

tool: {"D21": [0x00,0x00,0xa0,0x40]}

tool: {"D102": [0x00,0x00,0x10,0x41]}

tool: D154: enter r 

tool: D41: 3.14

tool: D53: 
Area is %f 

assistant: ```c
int main() {
  int iAns = 0;
  float a, r;
  float tf, tc;
  do {
    system("cls");
    printf("0-Exit\n");
    printf("1-Area\n");
    printf("2-Temp\n");
    printf("please choose : ");
    scanf("%d", &iAns);
    switch (iAns) {
    case 0:
      exit(0);
    case 1:
      printf("enter r ");
      scanf("%f", &r);
      a = 3.14 * r * r;
      printf("\nArea is %f ", a);
      break;
    case 2:
      printf("enter tf ");
      scanf("%f", &tf);
      tc = (5 * (tf - 32)) / 9;
      printf("\ntc is %f ", tc);
      break;
    default:
      printf("error\n");
      break;
    }
    _getch();
  } while (iAns != 0);
  return 0;
}
```