user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  push   %r15
  lea    D55(%rip),%rsi
  lea    D30(%rip),%rdi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  call   <fopen@plt>
  lea    D4(%rip),%rsi
  lea    D19(%rip),%rdi
  mov    %rax,%r12
  call   <fopen@plt>
  mov    $0x1a,%edi
  mov    %rax,0x8(%rsp)
  call   <malloc@plt>
  mov    $0x1a,%edi
  mov    %rax,%r14
  call   <malloc@plt>
  mov    $0x1a,%edi
  mov    %rax,%rbx
  mov    %rax,(%rsp)
  call   <malloc@plt>
  mov    %r12,%rdi
  mov    %rax,%rbp
  call   <fgetc@plt>
  mov    $0x1a,%esi
  mov    %r14,%rdi
  mov    %eax,%r13d
  call   <zeroStr@plt>
  mov    %rbx,%rdi
  mov    $0x1a,%esi
  call   <zeroStr@plt>
  mov    $0x1a,%esi
  mov    %rbp,%rdi
  call   <zeroStr@plt>
  mov    %r14,%rdi
  call   <puts@plt>
  mov    %rbx,%rdi
  mov    $0x33,%ebx
  call   <puts@plt>
  mov    %rbp,%rdi
  call   <puts@plt>
  jmp    L49
  nopl   0x0(%rax)
L2:
  mov    %r15d,%edi
  mov    %r14,%rsi
  call   <charLoc@plt>
  mov    %r12,%rdi
  movslq %eax,%r15
  call   <fgetc@plt>
  mov    %al,0x0(%rbp,%r15,1)
  mov    %eax,%r13d
  sub    $0x1,%ebx
  je     L15
L49:
  movsbl %r13b,%r15d
  mov    $0x1a,%edx
  mov    %r14,%rsi
  mov    %r15d,%edi
  call   <charExists@plt>
  test   %rax,%rax
  jne    L2
  cmpb   $0x30,(%r14)
  je     L30
  mov    $0x1,%eax
  nopl   0x0(%rax,%rax,1)
L60:
  lea    (%r14,%rax,1),%rdx
  mov    %rax,%r15
  add    $0x1,%rax
  cmpb   $0x30,-0x1(%r14,%rax,1)
  jne    L60
  add    (%rsp),%r15
L71:
  mov    %r13b,(%rdx)
  mov    %r12,%rdi
  call   <fgetc@plt>
  mov    %al,(%r15)
  mov    %eax,%r13d
  sub    $0x1,%ebx
  jne    L49
L15:
  mov    %r14,%rdi
  xor    %r12d,%r12d
  call   <puts@plt>
  mov    (%rsp),%rdi
  call   <puts@plt>
  mov    %rbp,%rdi
  call   <puts@plt>
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L18:
  mov    (%rsp),%rcx
  movzbl 0x0(%rbp,%rax,1),%ebx
  xor    %edx,%edx
  cmp    %bl,(%rcx,%rax,1)
  sete   %dl
  add    $0x1,%rax
  add    %edx,%r12d
  cmp    $0x1a,%rax
  jne    L18
  mov    %r12d,%esi
  lea    D34(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rsp),%rdi
  mov    %r12d,%edx
  lea    D1(%rip),%rsi
  call   <fprintf@plt>
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L30:
  mov    (%rsp),%r15
  mov    %r14,%rdx
  jmp    L71
```

tool_calls: name: disassemble_data
arguments: data_label: D55
type_infered: string
name: disassemble_data
arguments: data_label: D30
type_infered: string
name: disassemble_data
arguments: data_label: D4
type_infered: string
name: disassemble_data
arguments: data_label: D19
type_infered: string
name: disassemble_data
arguments: data_label: D34
type_infered: string
name: disassemble_data
arguments: data_label: D1
type_infered: string

tool: D55: r

tool: D30: circlecross.in

tool: D4: w

tool: D19: circlecross.out

tool: D34: Crossing Pairs: %d


tool: D1: %d


assistant: ```c
int main(void) {
  FILE *fl = fopen("circlecross.in", "r");
  FILE *fout = fopen("circlecross.out", "w");
  char *cows = malloc(sizeof(char) * 26);
  char *entryPair = malloc(sizeof(char) * 26);
  char *exitPair = malloc(sizeof(char) * 26);
  int i;
  char cow = fgetc(fl);
  int pos;
  int cowLoc;
  int pair;
  int pairs = 0;
  zeroStr(cows, 26);
  zeroStr(entryPair, 26);
  zeroStr(exitPair, 26);
  printf("%s\n", cows);
  printf("%s\n", entryPair);
  printf("%s\n", exitPair);
  for (i = 0; i < 51; i++) {
    if (charExists(cow, cows, 26) == 0) {
      pos = 0;
      while (*(cows + pos) != '0') {
        pos++;
      }
      *(cows + pos) = cow;
      pair = fgetc(fl);
      *(entryPair + pos) = pair;
      cow = pair;
    } else {
      cowLoc = charLoc(cow, cows);
      pair = fgetc(fl);
      *(exitPair + cowLoc) = pair;
      cow = pair;
    }
  }
  printf("%s\n", cows);
  printf("%s\n", entryPair);
  printf("%s\n", exitPair);
  pos = 0;
  while (pos < 26) {
    if (*(entryPair + pos) == *(exitPair + pos)) {
      pairs++;
    }
    pos++;
  }
  printf("Crossing Pairs: %d\n", pairs);
  fprintf(fout, "%d\n", pairs);
}
```