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php四舍五入函數(shù)

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May 25, 2016 pm 04:56 PM

這里統(tǒng)計了php中大量的四舍五入函數(shù)，包括有round(),ceil(),floor()等，有需要的朋友參考一下。

?代碼如下

復(fù)制代碼

? $s = rand(100,200);??
? $pi=pi();
? $r=sqrt($s/$pi);
? $qz1=round($r);?? //四舍五入取整
? $qz2=ceil($r);??? //進(jìn)一法取整
? $qz3=floor($r);?? //舍去法取整
?
? echo "隨機(jī)產(chǎn)生的圓的面積為：".$s."
";
? echo "通過除法和開方計算出的圓的半徑為：".$r."
";
? echo "四舍五入取整后：".$qz1."
";
? echo "進(jìn)一法取整后：".$qz2."
";
? echo "舍去法取整后：".$qz3."
";
??>

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