user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    D13(%rip),%rdi
  call   <printf@plt>
  lea    0x15(%rsp),%rcx
  lea    0x10(%rsp),%rdx
  lea    0xc(%rsp),%rsi
  lea    D62(%rip),%rdi
  call   <scanf@plt>
  cmp    $0x3,%eax
  jne    L100
  cmpl   $0xc,0xc(%rsp)
  jg     L48
  movzbl 0x15(%rsp),%edi
  test   %dil,%dil
  je     L31
  lea    0x15(%rsp),%rbx
L108:
  movsbl %dil,%edi
  call   <tolower@plt>
  mov    %al,(%rbx)
  add    $0x1,%rbx
  movzbl (%rbx),%edi
  test   %dil,%dil
  jne    L108
L31:
  movb   $0x0,0x17(%rsp)
  lea    0x15(%rsp),%rdi
  lea    D54(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L87
L55:
  mov    0xc(%rsp),%eax
  test   %eax,%eax
  jle    L107
  cmpl   $0x0,0x10(%rsp)
  js     L107
  cmpb   $0x70,0x15(%rsp)
  je     L0
L107:
  cmp    $0x2,%eax
  jg     L77
  cmpb   $0x61,0x15(%rsp)
  je     L0
L77:
  lea    D2(%rip),%rdi
  call   <printf@plt>
  mov    $0x0,%eax
  jmp    L81
L100:
  lea    D26(%rip),%rdi
  call   <printf@plt>
  mov    $0x1,%eax
L81:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L19
  add    $0x20,%rsp
  pop    %rbx
  ret
L48:
  lea    D8(%rip),%rdi
  call   <printf@plt>
  mov    $0x1,%eax
  jmp    L81
L87:
  lea    0x15(%rsp),%rdi
  lea    D85(%rip),%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L55
  lea    D55(%rip),%rdi
  call   <printf@plt>
  mov    $0x1,%eax
  jmp    L81
L0:
  lea    D57(%rip),%rdi
  call   <printf@plt>
  mov    $0x0,%eax
  jmp    L81
L19:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D13
type_guessed: string
name: retrieve_data
arguments: data_tag: D62
type_guessed: string
name: retrieve_data
arguments: data_tag: D54
type_guessed: string
name: retrieve_data
arguments: data_tag: D2
type_guessed: string
name: retrieve_data
arguments: data_tag: D26
type_guessed: string
name: retrieve_data
arguments: data_tag: D8
type_guessed: string
name: retrieve_data
arguments: data_tag: D85
type_guessed: string
name: retrieve_data
arguments: data_tag: D55
type_guessed: string
name: retrieve_data
arguments: data_tag: D57
type_guessed: string

tool: D13: Please enter time in format (hh:mm tt): 

tool: D62: %d:%d %2s

tool: D54: am

tool: D2: non-beer time


tool: D26: Invalid time format!


tool: D8: Hours must be between 1 and 12!


tool: D85: pm

tool: D55: tt must be AM or PM!


tool: D57: beer time


assistant: ```c
int main() {
  int hour, minutes;
  char amPm[3];
  printf("Please enter time in format (hh:mm tt): ");
  if (scanf("%d:%d %2s", &hour, &minutes, amPm) != 3) {
    printf("Invalid time format!\n");
    return 1;
  } else if (1 < hour && hour > 12) {
    printf("Hours must be between 1 and 12!\n");
    return 1;
  } else if (0 < minutes && hour > 59) {
    printf("Minutes must be between 0 and 59!\n");
    return 1;
  }
  int i = 0;
  while (amPm[i]) {
    amPm[i] = tolower(amPm[i]);
    i++;
  }
  amPm[2] = '\0';
  char *pm = "pm";
  char *am = "am";
  if ((strcmp(amPm, am) != 0) && (strcmp(amPm, pm) != 0)) {
    printf("tt must be AM or PM!\n");
    return 1;
  }
  int isBeerTime = (hour >= 1 && minutes >= 0 && amPm[0] == 'p') || (hour < 3 && amPm[0] == 'a');
  if (isBeerTime) {
    printf("beer time\n");
  } else {
    printf("non-beer time\n");
  }
  return 0;
}
```