(PHP implementation) Only use ++ operations to implement addition, subtraction, multiplication, and division_PHP tutorial

Addition

Copy code The code is as follows:

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

Subtraction

Copy code The code is as follows:

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

Multiplication

Copy code The code is as follows:

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

Division

Copy code The code is as follows:

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

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

http://www.bkjia.com/PHPjc/327885.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327885.htmlTechArticleAdditional copy code The code is as follows: function jiafa($a,$b) { for($i=0;$ i$b;$i++) { $a++; } return $a; } //echo jiafa(4,2); The subtraction copy code is as follows: function jianfa($a,$b) { $...