pointer and const

/*
author:justinzhang
email:uestczhangchao@gmail.com
time:2012-8-30 16:58:38
desc:for the practice of interview problem
*/
#include <iostream>
using namespace std;
struct Foo
{
    Foo(){}
    Foo(int) {}
    void fun() {}
};

int main()
{
    Foo a(10);
    a.fun();
    //Foo b();
    //b.fun();

    const char *p1 = "hello";
    char *const p2 = "world";
    p1++;
    //*p1 = 'w'; //error
    //p2++;      // error
    //*p2 = 'h';  //error : can not write to const string

    char str[][10] = {"hello","Google"};
    char *pstr = str[0];
    cout << strlen(pstr+10) << endl;
    /*

    str[ ][10]由定义可知，str[0]="Hello"，str[1]="Google"，

    内存中数据的存储为：

    str[0]                                       str[1]

    H e l l 0 '\0' '\0' '\0' '\0' '\0' '\0' G o o g l e '\0' '\0' '\0' '\0'

    所以p+10刚好为‘G’的地址，所以strlen(p+10)=6
    */

    int x[4] = {0};
    int y[4] = {1};

    for(int i=0; i<4; i++)
        cout << x[i] << " " << y[i] << endl;


    return 0;
}