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只使用++运算实现加法,减法,乘法,除法PHP实现

WBOY
WBOYOriginal
2016-06-13 10:53:29964browse

加法

[php] 
function jiafa($a,$b) 

    for($i=0;$i     { 
        $a++; 
    } 
    return $a; 

//echo jiafa(4,2); 

减法
[php] 
function jianfa($a,$b) 

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

乘法
[php] 
function chengfa($a,$b) 

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

除法
[php] 
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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