1. 指针修改变量;

    int p_int;
    p_int=&a;
    p_int=*p_int +1;

    1. 指针修改常量;

    int p_int =&a;
    p_int =(int
    )&b;
    p_int=p_int+1;

    1. 指针修改数组;