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(PHP实现)只使用++运算实现加法,减法,乘法,除法

WBOY
WBOYOriginal
2016-06-13 11:44:52896browse

加法

复制代码 代码如下:


function jiafa($a,$b)
{
 for($i=0;$i {
  $a++;
 }
 return $a;
}
//echo jiafa(4,2);


减法

复制代码 代码如下:


function jianfa($a,$b)
{
 $c=0;
    while($b!=$a)
 {
  $b++;
  $c++;
 }
 echo $c;
} // end func
//jianfa(10,3);


乘法

复制代码 代码如下:


function chengfa($a,$b)
{
 $c=0;
    for($j=0;$j {
  $c=jiafa($c,$a);
 }
 return $c;
} // end func
//chengfa(9,3);


除法

复制代码 代码如下:


function chufa($d,$e)
{
 $k=0;
 $f=0;
    while($f {
  $k++;
  $f=chengfa($e,$k);

 }
 return $k;
} // end func
echo chufa(16,2);


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