<?php
$a=$_REQUEST["num1"];
$b=$_REQUEST["num2"];
$fuhao=$_REQUEST["fuhao"]; class Cat{
public function jisuan($a,$b,$fuhao){ switch($fuhao){
case"+":
$a+$b;
echo '$a+$b='.$a+$b;
break;
case"-":
$a-$b;
echo '$a-$b='.$a-$b;
break;
case"*":
$a*$b;
echo '$a*$b='.$a*$b;
break;
case"/":
$a/$b;
echo '$a/$b='.$a/$b;
break;
}
}
} $cat1=new cat();
$cat1->jisuan ($a,$b,$fuhao);?>函数类
$a=$_REQUEST["num1"];
$b=$_REQUEST["num2"];
$fuhao=$_REQUEST["fuhao"]; class Cat{
public function jisuan($a,$b,$fuhao){ switch($fuhao){
case"+":
$a+$b;
echo '$a+$b='.$a+$b;
break;
case"-":
$a-$b;
echo '$a-$b='.$a-$b;
break;
case"*":
$a*$b;
echo '$a*$b='.$a*$b;
break;
case"/":
$a/$b;
echo '$a/$b='.$a/$b;
break;
}
}
} $cat1=new cat();
$cat1->jisuan ($a,$b,$fuhao);?>函数类
$a+$b;
echo '$a+$b='.($a+$b);
break;
case"-":
$a-$b;
echo '$a-$b='.($a-$b);
break;
改成 case"+":
$a+$b;
echo '$a+$b='.$a+$b;
break;
case"-":
$a-$b;
echo '$a-$b='.$a-$b;
break;养成加括弧的习惯
echo '$a-$b=' , $a-$b;
$c = $a+$b;
echo '$a+$b='.$c;