(PHP implementation) only use + + operations to achieve addition, subtraction, multiplication, Division _php skills

Addition

Copy Code code as follows:

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

Subtraction

Copy Code code as follows:

function Jianfa ($a, $b)
{
$c = 0;
while ($b!= $a)
{
$b + +;
$c + +;
}
Echo $c;
}//End Func
JIANFA (10,3);

multiplication

Copy Code code 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 code 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);