Here are statistics on a large number of rounding functions in PHP, including round(), ceil(), floor(), etc. Friends in need can refer to it.
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$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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