PHP实现的方程求解示例分析

<?php
//运行echo "开始运行 \n";
run();
echo "运行结束 \n";
function run()
{/{{{/$data = array(40.9, 40.5, 44.3, 47.8, 48.5, 42.1, 46.2);
  $res = array();
  foreach($dataas$key)
  {/{{{/echo "处理 {$key}\n";
    $resX = createX($key);
    foreach($resXas$keyX)
    {
      $keyStr = (string)$key;
      $keyXStr = (string)$keyX;
      $res[$keyStr][$keyXStr] = createParams4M($keyX);
    }
  }/}}}/error_log(print_r($res,true)."\n", 3, '/tmp/result.log');
var_dump(99999,$res);exit;
  return$res;
}/}}}///1.产生平均数function createX($ave)
{/{{{/$sum = 3($ave  1000);
  $x1 = $x2 = $x3 = 0;
  $rand4X1X2 = rand(0, 300);
  //$x2 > $x1 > $x3;for($i=0; $i< $ave  1000 + 550; $i++)
  {
    $x2 = $i;
    $x1 = $x2 - $rand4X1X2;
    $x3 = $sum -($x1 + $x2);
    $positive = $x1 > 0 && $x2 > 0 && $x3 > 0;
    $flag = ($x2- $x3 < 400 && $x2 - $x3 > 200);
    if($positive && $flag)
    {
      //echo "捕捉到\n";$roundX1 = round($x1/1000, 1);
      $roundX2 = round($x2/1000, 1);
      $roundX3 = round($x3/1000, 1);
      $res = array($roundX1, $roundX2, $roundX3);
      $flag = $roundX1 != $roundX2
          && $roundX3 != $roundX2
          && $roundX3 != $roundX1;
      if($flag)
      {
        //echo "捕捉到\n";return$res;
      }
    }
  }
  echo "Fail 未捕捉到\n";
  returnarray($x1, $x2, $x3);
}/}}}///2.产生平均数function createParams4M($aveX)
{/{{{/$begin = 48000;
  $end = 51000;
  $m0 = $m1 = $m2 = 0;
  $rand4M1M2 = rand(450, 550);
  $m0 = rand($begin, $end);
  $m1 = $m0 + $rand4M1M2;
  $m2 = $m1 - (($m1 - $m0)$aveX/100);
  //echo "捕捉到\n";returnarray(round($m0/1000, 4), round($m1/1000, 4), round($m2/1000, 4));
}/}}}/?>