user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x240,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D4(%rip),%rax
  mov    %rax,%rsi
  lea    D26(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x228(%rbp)
  lea    D4(%rip),%rax
  mov    %rax,%rsi
  lea    D52(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x220(%rbp)
  lea    D40(%rip),%rax
  mov    %rax,%rsi
  lea    D70(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x218(%rbp)
  jmp    L6
L8:
  mov    -0x228(%rbp),%rdx
  lea    -0x210(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x200,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  mov    %eax,-0x234(%rbp)
  mov    -0x218(%rbp),%rcx
  mov    -0x234(%rbp),%edx
  lea    -0x210(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
  mov    %eax,-0x230(%rbp)
  mov    -0x230(%rbp),%eax
  cmp    -0x234(%rbp),%eax
  je     L27
  lea    D46(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L27:
  mov    -0x220(%rbp),%rdx
  lea    -0x210(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x200,%edx
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  mov    %eax,-0x22c(%rbp)
  mov    -0x218(%rbp),%rcx
  mov    -0x22c(%rbp),%edx
  lea    -0x210(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
  mov    %eax,-0x230(%rbp)
  mov    -0x230(%rbp),%eax
  cmp    -0x22c(%rbp),%eax
  je     L6
  lea    D46(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L6:
  mov    -0x228(%rbp),%rax
  mov    %rax,%rdi
  call   <feof@plt>
  test   %eax,%eax
  jne    L30
  mov    -0x220(%rbp),%rax
  mov    %rax,%rdi
  call   <feof@plt>
  test   %eax,%eax
  je     L8
L30:
  mov    -0x228(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x220(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x218(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L29
  call   <__stack_chk_fail@plt>
L29:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D4
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D26
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D52
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D40
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D70
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D46
type_guessed: string

tool: D4: rb

tool: D26: file2.bmp

tool: D52: file3.bmp

tool: D40: wb

tool: D70: picture.bmp

tool: D46: Error in write command!


assistant: ```c
int main() {
  int nr1, nr2, nw;
  char buffer[512];
  FILE *fp1, *fp2, *fpOut;
  fp1 = fopen("file2.bmp", "rb");
  fp2 = fopen("file3.bmp", "rb");
  fpOut = fopen("picture.bmp", "wb");
  while (!feof(fp1) && !feof(fp2)) {
    nr1 = fread(buffer, 1, 512, fp1);
    nw = fwrite(buffer, 1, nr1, fpOut);
    if (nw != nr1) {
      printf("Error in write command!\n");
      getchar();
      exit(1);
    }
    nr2 = fread(buffer, 1, 512, fp2);
    nw = fwrite(buffer, 1, nr2, fpOut);
    if (nw != nr2) {
      printf("Error in write command!\n");
      getchar();
      exit(1);
    }
  }
  fclose(fp1);
  fclose(fp2);
  fclose(fpOut);
  return 0;
}
```