user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  movl   $0x4,0xc(%rsp)
  movl   $0x5,0x10(%rsp)
  movl   $0x636261,0x14(%rsp)
  movb   $0x61,0x15(%rsp)
  lea    0x14(%rsp),%rsi
  mov    %rsi,%rdx
  lea    D48(%rip),%rdi
  call   <printf@plt>
  lea    D20(%rip),%rdi
  call   <puts@plt>
  lea    0xc(%rsp),%r14
  mov    %r14,%rsi
  lea    D39(%rip),%r13
  mov    %r13,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc(%rsp),%esi
  lea    D24(%rip),%r12
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc(%rsp),%esi
  lea    D19(%rip),%rbp
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x10(%rsp),%esi
  lea    D16(%rip),%rbx
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movl   $0x63,0xc(%rsp)
  lea    D47(%rip),%rdi
  call   <puts@plt>
  mov    %r14,%rsi
  mov    %r13,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc(%rsp),%esi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc(%rsp),%esi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x10(%rsp),%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D79(%rip),%rdi
  call   <puts@plt>
  lea    0x10(%rsp),%rsi
  mov    %r13,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x10(%rsp),%esi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc(%rsp),%esi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x10(%rsp),%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  mov    $0x0,%eax
  add    $0x20,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L5:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_tag: D48
datatype: string
name: parse_data
arguments: data_tag: D20
datatype: string
name: parse_data
arguments: data_tag: D39
datatype: string
name: parse_data
arguments: data_tag: D24
datatype: string
name: parse_data
arguments: data_tag: D19
datatype: string
name: parse_data
arguments: data_tag: D16
datatype: string
name: parse_data
arguments: data_tag: D47
datatype: string
name: parse_data
arguments: data_tag: D79
datatype: string

tool: D48: val = %s , str = %s


tool: D20: ptr is x

tool: D39: address ptr %p


tool: D24: value   ptr %i


tool: D19: x       ptr %i


tool: D16: y       ptr %i


tool: D47: ptr set 99

tool: D79: ptr is y

assistant: ```c
int main() {
  int x = 4;
  int y = 5;
  int *ptr = &x;
  char val[] = "abc";
  char *pptr;
  pptr = val;
  val[1] = val[0];
  printf("val = %s , str = %s\n", val, pptr);
  printf("ptr is x\n");
  printf("address ptr %p\n", ptr);
  printf("value   ptr %i\n", *ptr);
  printf("x       ptr %i\n", x);
  printf("y       ptr %i\n", y);
  *ptr = 99;
  printf("ptr set 99\n");
  printf("address ptr %p\n", ptr);
  printf("value   ptr %i\n", *ptr);
  printf("x       ptr %i\n", x);
  printf("y       ptr %i\n", y);
  ptr = &y;
  printf("ptr is y\n");
  printf("address ptr %p\n", ptr);
  printf("value   ptr %i\n", *ptr);
  printf("x       ptr %i\n", x);
  printf("y       ptr %i\n", y);
}
```