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php四舍五入函数

May 25, 2016 pm 04:56 PM

这里统计了php中大量的四舍五入函数,包括有round(),ceil(),floor()等,有需要的朋友参考一下。
 代码如下 复制代码
  $s = rand(100,200);  
  $pi=pi();
  $r=sqrt($s/$pi);
  $qz1=round($r);   //四舍五入取整
  $qz2=ceil($r);    //进一法取整
  $qz3=floor($r);   //舍去法取整
 
  echo "随机产生的圆的面积为:".$s."
";
  echo "通过除法和开方计算出的圆的半径为:".$r."
";
  echo "四舍五入取整后:".$qz1."
";
  echo "进一法取整后:".$qz2."
";
  echo "舍去法取整后:".$qz3."
";
 ?>



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