算法(进制切换)

最新推荐文章于 2025-08-12 12:57:50 发布

原创最新推荐文章于 2025-08-12 12:57:50 发布 · 186 阅读

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这是一个用PHP编写的数值转换类，支持十进制、二进制、八进制和十六进制之间的转换。类中包含了各种转换方法，如`binnary_change`、`eight_change`、`ten_change`和`hexadecimal_change`，并在构造函数中初始化转换参数。通过实例化该类并传入数值和目标进制，可以进行进制转换。同时，类还设有错误处理机制，当输入超出精度范围或异常时会返回错误信息。

<?php
class suanfa_number{
  // 十进制
  private $number = 0;
  // 二进制
  private $binary_number = "00000000";

  // 八进制
  private $eight_number = "00000000";
  // 16进制
  private $hexadecimal_number = "00000000";

  private $type = 10;

  private $change_type = 2;

  //返回值
  public $res ;
  public $error = "";

  public function __construct($number,$type = "",$change_type = ""){
    
    if($change_type === $type && $change_type !== ""){
      $this->error =  "出现异常";
    }
    if($type !== ""){
      $this->type = intval($type);
    }
    if($change_type !== ""){
      $this->change_type = intval($change_type);
    }
    if($this->type == 2){
      $this->binary_number = $number;
    }else if($this->type == 10){
      if($number >= 9223372036854775808){
        $this->error = "超出精度,本方法只限制在long整型下";
      }
      $this->number = $number;
    }else if($this->type == 8){
      $this->eight_number = $number;
    }else if($this->type == 16){
      $this->hexadecimal_number = $number;
    }else{
      $this->error = "出现异常";
    }
    
    $this -> run();
  }

  private function run (){

    // 处理二进制
    $this-> number_change();

  }

  private function number_change(){

    if($this->change_type == 2){
      $res = $this -> binnary_change();
    }else if($this->change_type == 8){
      $res = $this -> eight_change();
    }else if($this->change_type == 10){
      $res = $this -> ten_change();
    }else if($this->change_type == 16){
      $res = $this -> hexadecimal_change();
    }else {
      return false;
    }
    $this->res = $res;
  }
  // 切换二进制
  private function binnary_change(){
    // 8 10 16 -> 2
    if($this->type == 10){
      return decbin($this->number);
    }else if($this->type == 8){
      $this->number = $this-> ten_change();
      return decbin($this->number);
    }else if($this->type == 16){
      $this->number = $this-> ten_change();
      return decbin($this->number);
    }
  }

  // 切换八进制
  private function eight_change(){

    if($this->type == 10){
      $res =  decoct($this->number);
    }else if($this->type == 2){
      $this->number = $this-> ten_change();
      $res =   decoct($this->number);
    }else if($this->type == 16){
      $this->number = $this-> ten_change();
      $res =   decoct($this->number);
    }
    return $res ;
  }

  // 切换十进制
  private function ten_change(){
    if($this->type == 2){
      $res =   bindec($this->binary_number);
    }else if($this->type == 10){
      $res =  octdec($this->eignt_number);
    }else if($this->type == 16){
      $res =  hexdec($this->hexadecimal_number);
    }
    if($res >= 9223372036854775808){
      if($this->type == 16){
        $error = "16进制 超出精度";
      }else if($this->type == 10){
        $error = "超出精度,本方法只限制在long整型下";
      }else if($this->type == 2){
        $error = "2进制 超出精度";
      }
      $this->error = $error;
    }
    return $res ;
  }

  // 切换十六进制
  private function hexadecimal_change(){
    if($this->type == 10){
      return dechex($this->number);
    }else if($this->type = 2){
      return bin2hex($this->binary_number);
    }else if($this->type = 8){
      $this->number = $this-> ten_change();
      return bin2hex($this->binary_number);
    }
  }
  
}

// 任意转换
$t1=microtime(true); 

// base_convert(9223372036854775807,10,16);
$suanfa = new suanfa_number("101010101010101001010101010101010100101010101111010",2,10);
$t2=microtime(true);
$time1=$t2-$t1;
var_dump($time1);
var_dump($suanfa->res);
var_dump($suanfa->error);