user: Demonstrate the C code that generates the assembly output below:

```asm
<joinfiles>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  lea    D15(%rip),%r13
  push   %r12
  lea    D30(%rip),%r12
  push   %rbp
  push   %rbx
  sub    $0x218,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x208(%rsp)
  xor    %eax,%eax
  lea    0x100(%rsp),%rbp
  xchg   %ax,%ax
L13:
  mov    %r12,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    %rbp,%rsi
  mov    %r13,%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  mov    %rbp,%rdi
  xor    %eax,%eax
  call   <atoi@plt>
  mov    %eax,%ebx
  cmp    $0x1,%eax
  jle    L13
  movslq %eax,%rdi
  xor    %ebp,%ebp
  lea    D44(%rip),%r15
  shl    $0x3,%rdi
  call   <malloc@plt>
  mov    %ebx,%esi
  lea    D34(%rip),%rdi
  mov    %rax,%r14
  xor    %eax,%eax
  call   <printf@plt>
  mov    %r14,%r12
  nopl   0x0(%rax,%rax,1)
L20:
  mov    $0x100,%edi
  add    $0x1,%ebp
  add    $0x8,%r12
  call   <malloc@plt>
  mov    $0xff,%edx
  mov    %ebp,%esi
  mov    %r15,%rdi
  mov    %rax,-0x8(%r12)
  xor    %eax,%eax
  call   <printf@plt>
  mov    -0x8(%r12),%rsi
  mov    %r13,%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  cmp    %ebx,%ebp
  jl     L20
  mov    %rsp,%r12
  mov    $0xff,%esi
  xor    %eax,%eax
  xor    %ebp,%ebp
  lea    D12(%rip),%rdi
  call   <printf@plt>
  mov    %r12,%rsi
  mov    %r13,%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  mov    %r12,%rdx
  mov    %r14,%rsi
  mov    %ebx,%edi
  xor    %eax,%eax
  call   <joindata@plt>
  mov    %eax,%r12d
  nopl   0x0(%rax)
L33:
  mov    (%r14,%rbp,8),%rdi
  add    $0x1,%rbp
  call   <free@plt>
  cmp    %ebp,%ebx
  jg     L33
  mov    %r14,%rdi
  call   <free@plt>
  mov    0x208(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L39
  add    $0x218,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L39:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: label: D15
type_guessed: string
name: read_data
arguments: label: D30
type_guessed: string
name: read_data
arguments: label: D44
type_guessed: string
name: read_data
arguments: label: D34
type_guessed: string
name: read_data
arguments: label: D12
type_guessed: string

tool: D15: %s

tool: D30:   choose the number of files to join (>1): 

tool: D44:     file %d (max %d character): 

tool: D34: 
  choose %d files to be joint (.dat)


tool: D12: 
  insert name for created file (.dat) (max %d character): 

assistant: ```c
int joinfiles() {
  int i, error, ninp;
  char outp[256], str[256], **linp;
  do {
    printf("  choose the number of files to join (>1): ");
    scanf("%s", &str);
    ninp = atoi(str);
  } while (ninp <= 1);
  linp = (char **)malloc(ninp * sizeof(char *));
  printf("\n  choose %d files to be joint (.dat)\n", ninp);
  for (i = 0; i < ninp; i++) {
    linp[i] = (char *)malloc(256 * sizeof(char));
    printf("    file %d (max %d character): ", i + 1, 256 - 1);
    scanf("%s", linp[i]);
  }
  printf("\n  insert name for created file (.dat) (max %d character): ", 256 - 1);
  scanf("%s", outp);
  error = joindata(ninp, linp, outp);
  for (i = 0; i < ninp; i++) {
    free(linp[i]);
  }
  free(linp);
  return error;
}
```