<html><body><?phpfunction calculation($para1,$para2,$operator){// write your code here!}function sum($start,$end,$step){// write your code here!}calculation(3,4,'add'); // do additioncalculation(3,4,'sub'); // do subtractioncalculation(3,4,'mul'); // do multiplicationcalculation(3,4,'div'); // do divisionsum(1,100,1);sum(1,100,2);?></body></html>在“ write your code here!”这里写代码，让输出结果为：7-1120.7550502500谢谢！
2 回答
海绵宝宝撒
TA贡献1809条经验 获得超8个赞
function calculation($para1,$para2,$operator){
switch($operator){
case 'add':return $para1+$para2;
break;
case 'sub':return $para1-$para2;
break;
case 'mul':return $para1*$para2;
break;
case 'div':return $para1/$para2;
break;
default:return false;
}
}
function sum($start,$end,$step){
$sum=0;
for($i=$start;$i<=$end;$i+=$step){
$sum+=$i;
}
return $sum;
}
调用函数是一个返回值，如果你想函数直接输出，那么把return 改成 echo就行了
不过建议你这样调用：
echo calculation(3,4,'add'); // do addition
echo calculation(3,4,'sub'); // do subtraction
echo calculation(3,4,'mul'); // do multiplication
echo calculation(3,4,'div'); // do division
echo sum(1,100,1);
echo sum(1,100,2);
炎炎设计
TA贡献1808条经验 获得超4个赞
function calculation($para1,$para2,$operator){
switch($operator){
case 'add':return $para1+$para2;
break;
case 'sub':return $para1-$para2;
break;
case 'mul':return $para1*$para2;
break;
case 'div':return $para1/$para2;
break;
default:return false;
}
}
function sum($start,$end,$step){
$sum=0;
for($i=$start;$i<=$end;$i+=$step){
$sum+=$i;
}
return $sum;
}
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