本人菜鸟一个，这是基础测试题。会的帮我解一下，thank you

实际上是利用了number1或number2本身作为了中间变量,代替了第三方变量；
1. number1= number1+ number2;
    number2= number1- number2;
    number1= number1- number2;
2. number1= number1* number2;
    number2=  number1/ number2;
    number1= number1/ number2;
3. number1= number1-  number2;
    number2= number1+  number2;
    number1= number2-  number1;
4. number1= number1^ number2;
    number2= number1^ number2;
    number1= number1^ number2;

可以借助两个变量自身，先求和后加减
x = x + y;
y = x - y;
x = x - y;

亲，也可以通过乘除法
x=x*y;
y=x/y;
x=x/y;