i++和++i的区别

一组简单的计算题：

        int i=0 ,j=0;

        int a=0, b=0;

        请计算： i = i++        求:   i=？
                   a = i++              i=？,a=?
                   j = ++j               j=？
                   b = ++j              j=？,b=?

测试用例：

        int i=0 ,j=0,k=0,p=0;

        int a=0, b=0;

        Response.Write("i的初始值是:" + i.ToString());
        i = i++;
        Response.Write("=======算式(i=i++)=========");
        Response.Write("计算后的i是:" + i.ToString() + "\r\n");
        Response.Write("<br>");

        Response.Write("k的初始值是:" + k.ToString());
        a = k++;
        Response.Write("======算式(a=k++)========");
        Response.Write("计算后的a是:" + a.ToString() + ";计算后的k是:" + k.ToString() + "\r\n");
        Response.Write("<br>");



        Response.Write("j的初始值是:" + j.ToString());
        j = ++j;
        Response.Write("=====算式(j=++j)========");
        Response.Write("计算后的j是:" + j.ToString() + "\r\n");
        Response.Write("<br>");

        Response.Write("q的初始值是:" + p.ToString());
        b = ++p;
        Response.Write("=====算式(b=++p)========");
        Response.Write("计算后的b是:" + b.ToString() + ";计算后的p是:" + p.ToString() + "\r\n");
        Response.Write("<br>");

得出的结果：

i的初始值是:0=======算式(i=i++)=========计算后的i是:0 
k的初始值是:0======算式(a=k++)========计算后的a是:0;计算后的k是:1 
j的初始值是:0=====算式(j=++j)========计算后的j是:1 
q的初始值是:0=====算式(b=++p)========计算后的b是:1;计算后的p是:1