int main()
{
    char str[] = "hello world";
    char sec[] = "code world";
 
 
    const char *ptr1 = str;
    cout << ptr1 << endl;
    strcpy(str,"hi world");
    cout << ptr1 << endl;
    ptr1 = sec;//直接改变指针指向
    cout << ptr1 << endl;
    sec[0] = 'o';
    cout << ptr1 << endl;
    ptr1[0] = 'a';//直接改变指针指向的值,报错
 
 
    char ss[] = "good game";
    char *const ptr2 = ss;
    cout << ptr2 << endl;
    ptr2[0] ='a';//直接改变指针指向的值
    cout << ptr2 << endl;
    strcpy(ptr2, "last");
    cout << ptr2 << endl;
    ss[0] = 'z';
    cout << ptr2 << endl;
    ptr2 = sec;//直接改变指针指向,报错
    system("pause");
}