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

```asm
<getnum>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
  movl   $0x80000001,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2b,%al
  jne    L282
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x18(%rbp)
  jmp    L91
L282:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  jne    L479
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x18(%rbp)
  cmpl   $0x80000001,-0x18(%rbp)
  je     L91
  negl   -0x18(%rbp)
  jmp    L91
L479:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x7e,%al
  jne    L104
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x18(%rbp)
  cmpl   $0x80000001,-0x18(%rbp)
  je     L91
  notl   -0x18(%rbp)
  jmp    L91
L104:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x28,%al
  jne    L370
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x9,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x29,%al
  jne    L99
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  jmp    L91
L99:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L91
L370:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jle    L189
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x39,%al
  jg     L189
  mov    -0x10(%rbp),%rax
  lea    -0x10(%rbp),%rcx
  mov    $0x0,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strtol@plt>
  mov    %eax,-0x18(%rbp)
  jmp    L91
L189:
  movl   $0x80000001,-0x18(%rbp)
L91:
  cmpl   $0x80000001,-0x18(%rbp)
  je     L232
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2b,%al
  jne    L408
  cmpl   $0x2,-0x2c(%rbp)
  jle    L408
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x2,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L178
  mov    -0x14(%rbp),%eax
  add    %eax,-0x18(%rbp)
  jmp    L325
L178:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L408:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  jne    L694
  cmpl   $0x2,-0x2c(%rbp)
  jle    L694
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x2,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L187
  mov    -0x14(%rbp),%eax
  sub    %eax,-0x18(%rbp)
  jmp    L325
L187:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L694:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2a,%al
  jne    L724
  cmpl   $0x1,-0x2c(%rbp)
  jle    L724
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L343
  mov    -0x18(%rbp),%eax
  imul   -0x14(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  jmp    L325
L343:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L724:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L551
  cmpl   $0x1,-0x2c(%rbp)
  jle    L551
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L373
  cmpl   $0x0,-0x14(%rbp)
  je     L373
  mov    -0x18(%rbp),%eax
  cltd
  idivl  -0x14(%rbp)
  mov    %eax,-0x18(%rbp)
  jmp    L325
L373:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L551:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x25,%al
  jne    L77
  cmpl   $0x1,-0x2c(%rbp)
  jle    L77
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L263
  cmpl   $0x0,-0x14(%rbp)
  je     L263
  mov    -0x18(%rbp),%eax
  cltd
  idivl  -0x14(%rbp)
  mov    %edx,-0x18(%rbp)
  jmp    L325
L263:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L77:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x3c,%al
  jne    L87
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x3c,%al
  jne    L87
  cmpl   $0x3,-0x2c(%rbp)
  jle    L87
  mov    -0x10(%rbp),%rax
  add    $0x2,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x3,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L501
  cmpl   $0x0,-0x14(%rbp)
  je     L501
  mov    -0x14(%rbp),%eax
  mov    %eax,%ecx
  shll   %cl,-0x18(%rbp)
  jmp    L325
L501:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L87:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x3e,%al
  jne    L668
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x3e,%al
  jne    L668
  cmpl   $0x3,-0x2c(%rbp)
  jle    L668
  mov    -0x10(%rbp),%rax
  add    $0x2,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x3,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L418
  cmpl   $0x0,-0x14(%rbp)
  je     L418
  mov    -0x14(%rbp),%eax
  mov    %eax,%ecx
  sarl   %cl,-0x18(%rbp)
  jmp    L325
L418:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L668:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x26,%al
  jne    L384
  cmpl   $0x4,-0x2c(%rbp)
  jle    L384
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x4,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L496
  mov    -0x14(%rbp),%eax
  and    %eax,-0x18(%rbp)
  jmp    L325
L496:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L384:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x5e,%al
  jne    L512
  cmpl   $0x5,-0x2c(%rbp)
  jle    L512
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x5,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L228
  mov    -0x14(%rbp),%eax
  xor    %eax,-0x18(%rbp)
  jmp    L325
L228:
  movl   $0x80000001,-0x18(%rbp)
  jmp    L325
L512:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x7c,%al
  jne    L653
  cmpl   $0x6,-0x2c(%rbp)
  jle    L653
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x10(%rbp),%rax
  mov    $0x6,%esi
  mov    %rax,%rdi
  call   <getnum>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x80000001,-0x14(%rbp)
  je     L443
  mov    -0x14(%rbp),%eax
  or     %eax,-0x18(%rbp)
  jmp    L91
L443:
  movl   $0x80000001,-0x18(%rbp)
L325:
  jmp    L91
L232:
  nop
L653:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <skipspace@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rdx,(%rax)
  mov    -0x18(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L493
  call   <__stack_chk_fail@plt>
L493:
  leave
  ret
```

assistant: ```c
int getnum(char **pp, int priority) {
  char *p = *pp;
  int i = -0x7fffffff, j;
  p = skipspace(p);
  if (*p == '+') {
    p = skipspace(p + 1);
    i = getnum(&p, 0);
  } else if (*p == '-') {
    p = skipspace(p + 1);
    i = getnum(&p, 0);
    if (i != -0x7fffffff) {
      i = -i;
    }
  } else if (*p == '~') {
    p = skipspace(p + 1);
    i = getnum(&p, 0);
    if (i != -0x7fffffff) {
      i = ~i;
    }
  } else if (*p == '(') {
    p = skipspace(p + 1);
    i = getnum(&p, 9);
    if (*p == ')') {
      p = skipspace(p + 1);
    } else {
      i = -0x7fffffff;
    }
  } else if ('0' <= *p && *p <= '9') {
    i = strtol(p, &p, 0);
  } else {
    i = -0x7fffffff;
  }
  for (;;) {
    if (i == -0x7fffffff) {
      break;
    }
    p = skipspace(p);
    if (*p == '+' && priority > 2) {
      p = skipspace(p + 1);
      j = getnum(&p, 2);
      if (j != -0x7fffffff) {
        i += j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '-' && priority > 2) {
      p = skipspace(p + 1);
      j = getnum(&p, 2);
      if (j != -0x7fffffff) {
        i -= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '*' && priority > 1) {
      p = skipspace(p + 1);
      j = getnum(&p, 1);
      if (j != -0x7fffffff) {
        i *= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '/' && priority > 1) {
      p = skipspace(p + 1);
      j = getnum(&p, 1);
      if (j != -0x7fffffff && j != 0) {
        i /= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '%' && priority > 1) {
      p = skipspace(p + 1);
      j = getnum(&p, 1);
      if (j != -0x7fffffff && j != 0) {
        i %= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '<' && p[1] == '<' && priority > 3) {
      p = skipspace(p + 2);
      j = getnum(&p, 3);
      if (j != -0x7fffffff && j != 0) {
        i <<= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '>' && p[1] == '>' && priority > 3) {
      p = skipspace(p + 2);
      j = getnum(&p, 3);
      if (j != -0x7fffffff && j != 0) {
        i >>= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '&' && priority > 4) {
      p = skipspace(p + 1);
      j = getnum(&p, 4);
      if (j != -0x7fffffff) {
        i &= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '^' && priority > 5) {
      p = skipspace(p + 1);
      j = getnum(&p, 5);
      if (j != -0x7fffffff) {
        i ^= j;
      } else {
        i = -0x7fffffff;
      }
    } else if (*p == '|' && priority > 6) {
      p = skipspace(p + 1);
      j = getnum(&p, 6);
      if (j != -0x7fffffff) {
        i |= j;
      } else {
        i = -0x7fffffff;
      }
    } else {
      break;
    }
  }
  p = skipspace(p);
  *pp = p;
  return i;
}
```