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

```asm
<usage>:
  endbr64
  push   %rbx
  mov    %edi,%ebx
  lea    D63(%rip),%rdi
  call   <printf@plt>
  lea    D120(%rip),%rdi
  call   <printf@plt>
  lea    D36(%rip),%rdi
  call   <printf@plt>
  lea    D125(%rip),%rdi
  call   <printf@plt>
  lea    D3(%rip),%rdi
  call   <printf@plt>
  lea    D47(%rip),%rdi
  call   <printf@plt>
  lea    D85(%rip),%rdi
  call   <printf@plt>
  lea    D44(%rip),%rdi
  call   <printf@plt>
  lea    D87(%rip),%rdi
  call   <printf@plt>
  lea    D123(%rip),%rdi
  call   <printf@plt>
  lea    D38(%rip),%rdi
  call   <printf@plt>
  lea    D134(%rip),%rdi
  call   <printf@plt>
  lea    D137(%rip),%rdi
  call   <printf@plt>
  lea    D149(%rip),%rdi
  call   <printf@plt>
  lea    D124(%rip),%rdi
  call   <printf@plt>
  mov    %ebx,%edi
  call   <exit@plt>
  pop    %rbx
  ret
```

tool_calls: name: read_data
arguments: tag: D63
datatype: string
name: read_data
arguments: tag: D120
datatype: string
name: read_data
arguments: tag: D36
datatype: string
name: read_data
arguments: tag: D125
datatype: string
name: read_data
arguments: tag: D3
datatype: string
name: read_data
arguments: tag: D47
datatype: string
name: read_data
arguments: tag: D85
datatype: string
name: read_data
arguments: tag: D44
datatype: string
name: read_data
arguments: tag: D87
datatype: string
name: read_data
arguments: tag: D123
datatype: string
name: read_data
arguments: tag: D38
datatype: string
name: read_data
arguments: tag: D134
datatype: string
name: read_data
arguments: tag: D137
datatype: string
name: read_data
arguments: tag: D149
datatype: string
name: read_data
arguments: tag: D124
datatype: string

tool: D63: 
Converts from DM to Dist and vice versa - electron density model


tool: D120: Usage:


tool: D36: ymw16 [-h] [-t text] [-d <dirname>] [-v] [-V] <mode> gl gb DM/Dist [DM_Host] ndir


tool: D125: -h prints this help page


tool: D3: -t <text>, where <text> (no spaces, max 64 char) is appended to the output line


tool: D47: -d <dirname>, where <dirname> is a directory containing YMW16 data files


tool: D85: -v prints diagnostics


tool: D44: -V prints more diagnostics


tool: D87: <mode> is Gal, MC, or IGM


tool: D123: gl, gb in deg, DM in cm^-3 pc, Dist in pc (Gal, MC) or Mpc (IGM)


tool: D38: DM_Host is the contribution of the FRB host galaxy to the observed DM


tool: D134: Only used for IGM mode; optional input, default=100 cm^-3 pc


tool: D137: ndir=1 for DM->Dist, ndir=2 for Dist->DM


tool: D149: Output includes log(tau_sc) where tau_sc is scattering time in sec at 1 GHz


tool: D124: 


assistant: ```c
void usage(int status) {
  printf("\nConverts from DM to Dist and vice versa - electron density model\n");
  printf("Usage:\n");
  printf("ymw16 [-h] [-t text] [-d <dirname>] [-v] [-V] <mode> gl gb DM/Dist [DM_Host] ndir\n");
  printf("-h prints this help page\n");
  printf("-t <text>, where <text> (no spaces, max 64 char) is appended to the output line\n");
  printf("-d <dirname>, where <dirname> is a directory containing YMW16 data files\n");
  printf("-v prints diagnostics\n");
  printf("-V prints more diagnostics\n");
  printf("<mode> is Gal, MC, or IGM\n");
  printf("gl, gb in deg, DM in cm^-3 pc, Dist in pc (Gal, MC) or Mpc (IGM)\n");
  printf("DM_Host is the contribution of the FRB host galaxy to the observed DM\n");
  printf("Only used for IGM mode; optional input, default=100 cm^-3 pc\n");
  printf("ndir=1 for DM->Dist, ndir=2 for Dist->DM\n");
  printf("Output includes log(tau_sc) where tau_sc is scattering time in sec at 1 GHz\n");
  printf("\n");
  exit(status);
}
```