user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    D77(%rip),%rsi
  lea    D61(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  lea    D36(%rip),%rsi
  lea    D111(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  mov    $0x0,%ebx
  lea    0xc(%rsp),%r15
  lea    0x10(%rsp),%r14
  lea    D69(%rip),%r13
L5:
  mov    %r15,%rcx
  mov    %r14,%rdx
  mov    %r13,%rsi
  mov    %r12,%rdi
  call   <fscanf@plt>
  movss  0xc(%rsp),%xmm0
  mov    0x10(%rsp),%rcx
  mov    %ebx,%edx
  lea    D2(%rip),%rsi
  mov    %rbp,%rdi
  call   <fprintf@plt>
  add    $0x1,%ebx
  cmp    $0x15,%ebx
  jne    L5
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  lea    D77(%rip),%rsi
  lea    D76(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  lea    D36(%rip),%rsi
  lea    D121(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  mov    $0x0,%ebx
  lea    0xc(%rsp),%r15
  lea    0x10(%rsp),%r14
  lea    D69(%rip),%r13
L17:
  mov    %r15,%rcx
  mov    %r14,%rdx
  mov    %r13,%rsi
  mov    %r12,%rdi
  call   <fscanf@plt>
  movss  0xc(%rsp),%xmm0
  mov    0x10(%rsp),%rcx
  mov    %ebx,%edx
  lea    D2(%rip),%rsi
  mov    %rbp,%rdi
  call   <fprintf@plt>
  add    $0x1,%ebx
  cmp    $0x15,%ebx
  jne    L17
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  lea    D77(%rip),%rsi
  lea    D106(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  lea    D36(%rip),%rsi
  lea    D162(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  mov    $0x0,%ebx
  lea    0xc(%rsp),%r15
  lea    0x10(%rsp),%r14
  lea    D69(%rip),%r13
L2:
  mov    %r15,%rcx
  mov    %r14,%rdx
  mov    %r13,%rsi
  mov    %r12,%rdi
  call   <fscanf@plt>
  movss  0xc(%rsp),%xmm0
  mov    0x10(%rsp),%rcx
  mov    %ebx,%edx
  lea    D2(%rip),%rsi
  mov    %rbp,%rdi
  call   <fprintf@plt>
  add    $0x1,%ebx
  cmp    $0x15,%ebx
  jne    L2
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  lea    D77(%rip),%rsi
  lea    D230(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  lea    D36(%rip),%rsi
  lea    D52(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  mov    $0x0,%ebx
  lea    0xc(%rsp),%r15
  lea    0x10(%rsp),%r14
  lea    D69(%rip),%r13
L24:
  mov    %r15,%rcx
  mov    %r14,%rdx
  mov    %r13,%rsi
  mov    %r12,%rdi
  call   <fscanf@plt>
  movss  0xc(%rsp),%xmm0
  mov    0x10(%rsp),%rcx
  mov    %ebx,%edx
  lea    D2(%rip),%rsi
  mov    %rbp,%rdi
  call   <fprintf@plt>
  add    $0x1,%ebx
  cmp    $0x15,%ebx
  jne    L24
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L18
  mov    $0x0,%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L18:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D77
data_type: string
name: retrieve_data
arguments: tag: D61
data_type: string
name: retrieve_data
arguments: tag: D36
data_type: string
name: retrieve_data
arguments: tag: D111
data_type: string
name: retrieve_data
arguments: tag: D69
data_type: string
name: retrieve_data
arguments: tag: D2
data_type: string
name: retrieve_data
arguments: tag: D76
data_type: string
name: retrieve_data
arguments: tag: D121
data_type: string
name: retrieve_data
arguments: tag: D106
data_type: string
name: retrieve_data
arguments: tag: D162
data_type: string
name: retrieve_data
arguments: tag: D230
data_type: string
name: retrieve_data
arguments: tag: D52
data_type: string

tool: D77: r

tool: D61: mc.dat

tool: D36: w

tool: D111: mc1.dat

tool: D69: %ld %f

tool: D2: %d %ld %f


tool: D76: nmc.dat

tool: D121: nmc1.dat

tool: D106: blk.dat

tool: D162: blk1.dat

tool: D230: nblk.dat

tool: D52: nblk1.dat

assistant: ```c
int main(void) {
  FILE *ifile, *ofile;
  int i;
  long size;
  float time;
  ifile = fopen("mc.dat", "r");
  ofile = fopen("mc1.dat", "w");
  for (i = 0; i < 21; i++) {
    fscanf(ifile, "%ld %f", &size, &time);
    fprintf(ofile, "%d %ld %f\n", i, size, time);
  }
  fclose(ifile);
  fclose(ofile);
  ifile = fopen("nmc.dat", "r");
  ofile = fopen("nmc1.dat", "w");
  for (i = 0; i < 21; i++) {
    fscanf(ifile, "%ld %f", &size, &time);
    fprintf(ofile, "%d %ld %f\n", i, size, time);
  }
  fclose(ifile);
  fclose(ofile);
  ifile = fopen("blk.dat", "r");
  ofile = fopen("blk1.dat", "w");
  for (i = 0; i < 21; i++) {
    fscanf(ifile, "%ld %f", &size, &time);
    fprintf(ofile, "%d %ld %f\n", i, size, time);
  }
  fclose(ifile);
  fclose(ofile);
  ifile = fopen("nblk.dat", "r");
  ofile = fopen("nblk1.dat", "w");
  for (i = 0; i < 21; i++) {
    fscanf(ifile, "%ld %f", &size, &time);
    fprintf(ofile, "%d %ld %f\n", i, size, time);
  }
  fclose(ifile);
  fclose(ofile);
  return 0;
}
```