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Use only ++ operations to implement addition, subtraction, multiplication, and division in PHP_PHP tutorial

WBOY
WBOYOriginal
2016-07-14 10:07:04919browse

加法

[php] 
function jiafa($a,$b) 

    for($i=0;$i<$b;$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;$j<$b;$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<$d) 
    { 
        $k++; 
        $f=chengfa($e,$k); 
         
    } 
    return $k; 
} // end func 
echo chufa(16,2); 

 

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/477889.htmlTechArticle加法 [php] function jiafa($a,$b) { for($i=0;$i$b;$i++) { $a++; } return $a; } //echo jiafa(4,2); 减法 [php] function jianfa($a,$b) { $c=0; while($b!=$a) { $b++; $c++; } echo $c...
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