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
  add    $0xffffffffffffff80,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D59(%rip),%rax
  mov    %rax,%rsi
  lea    D46(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x68(%rbp)
  cmpq   $0x0,-0x68(%rbp)
  jne    L44
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <nrerror@plt>
L44:
  mov    -0x68(%rbp),%rdx
  lea    -0x60(%rbp),%rax
  mov    $0x50,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  jmp    L56
L22:
  mov    -0x68(%rbp),%rdx
  lea    -0x60(%rbp),%rax
  mov    $0x50,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  mov    -0x68(%rbp),%rax
  mov    %rax,%rdi
  call   <feof@plt>
  test   %rax,%rax
  je     L56
  lea    D88(%rip),%rax
  mov    %rax,%rdi
  call   <nrerror@plt>
L56:
  lea    -0x60(%rbp),%rax
  mov    $0xe,%edx
  lea    D73(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L22
  lea    -0x78(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  lea    D75(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fscanf@plt>
  lea    D103(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D44(%rip),%rax
  mov    %rax,%rcx
  lea    D105(%rip),%rax
  mov    %rax,%rdx
  lea    D13(%rip),%rax
  mov    %rax,%rsi
  lea    D76(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movl   $0x1,-0x6c(%rbp)
  jmp    L47
L49:
  lea    -0x70(%rbp),%rcx
  lea    -0x74(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  lea    D71(%rip),%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fscanf@plt>
  movss  -0x70(%rbp),%xmm1
  movss  D29(%rip),%xmm0
  subss  %xmm1,%xmm0
  movss  %xmm0,-0x70(%rbp)
  mov    -0x74(%rbp),%eax
  movd   %eax,%xmm0
  call   <erffc@plt>
  movq   %xmm0,%rdx
  movss  -0x70(%rbp),%xmm0
  cvtss2sd %xmm0,%xmm0
  movss  -0x74(%rbp),%xmm1
  pxor   %xmm3,%xmm3
  cvtss2sd %xmm1,%xmm3
  movq   %xmm3,%rax
  movq   %rdx,%xmm2
  movapd %xmm0,%xmm1
  movq   %rax,%xmm0
  lea    D4(%rip),%rax
  mov    %rax,%rdi
  mov    $0x3,%eax
  call   <printf@plt>
  addl   $0x1,-0x6c(%rbp)
L47:
  mov    -0x78(%rbp),%eax
  cmp    %eax,-0x6c(%rbp)
  jle    L49
  mov    -0x68(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L6
  call   <__stack_chk_fail@plt>
L6:
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D59
datatype: string
name: retrieve_data
arguments: data_label: D46
datatype: string
name: retrieve_data
arguments: data_label: D18
datatype: string
name: retrieve_data
arguments: data_label: D88
datatype: string
name: retrieve_data
arguments: data_label: D73
datatype: string
name: retrieve_data
arguments: data_label: D75
datatype: string
name: retrieve_data
arguments: data_label: D103
datatype: string
name: retrieve_data
arguments: data_label: D44
datatype: string
name: retrieve_data
arguments: data_label: D105
datatype: string
name: retrieve_data
arguments: data_label: D13
datatype: string
name: retrieve_data
arguments: data_label: D76
datatype: string
name: retrieve_data
arguments: data_label: D71
datatype: string
name: retrieve_data
arguments: data_label: D29
datatype: f32
name: retrieve_data
arguments: data_label: D4
datatype: string

tool: D59: r

tool: D46: fncval.dat

tool: D18: Data file fncval.dat not found


tool: D88: Data not found in fncval.dat


tool: D73: Error Function

tool: D75: %d %*s

tool: D103: 
complementary error function

tool: D44: erfc(x)

tool: D105: actual

tool: D13: x

tool: D76: %5s %12s %13s


tool: D71: %f %f

tool: D29: 1

tool: D4: %6.2f %12.7f %12.7f


assistant: ```c
int main(void) {
  char txt[80];
  int i, nval;
  float x, val;
  FILE *fp;
  if ((fp = fopen("fncval.dat", "r")) == NULL)
    nrerror("Data file fncval.dat not found\n");
  fgets(txt, 80, fp);
  while (strncmp(txt, "Error Function", 14)) {
    fgets(txt, 80, fp);
    if (feof(fp))
      nrerror("Data not found in fncval.dat\n");
  }
  fscanf(fp, "%d %*s", &nval);
  printf("\ncomplementary error function\n");
  printf("%5s %12s %13s\n", "x", "actual", "erfc(x)");
  for (i = 1; i <= nval; i++) {
    fscanf(fp, "%f %f", &x, &val);
    val = 1.0 - val;
    printf("%6.2f %12.7f %12.7f\n", x, val, erffc(x));
  }
  fclose(fp);
  return 0;
}
```