请输入第一个值:
请输入第二个值:
请选择运算符:+-*/
<?php
function __getresult(){
$num1=$_POST['num1'];
$num2=$_POST['num2'];
$operator=$_POST['operator'];
$res=0;
if($operator=="+"){
$res="num1+num2";
}else if (operator=="-"){
$res="num1-num2";
}else if(operator=="*"){
$res="num1*num2";
}else if(operator=="/"){
$res="num1/num2";
}
return true ;
}
echo $res; //这行出错了
报错信息
Notice: Undefined variable: res in D:\wamp\www\jisuanqiTest\result.php on line 18
该怎么改啊? 新人求解答 谢谢各位大大