c++中字符型指针问题

#include<iostream>
#include<cstring>
using namespace std;

class String
{
private:
    char *s;
    int size;
public:
    String(const char *str = NULL); // constructor
    ~String() { delete [] s;  }// destructor
    void print() { cout << s << endl; }
    void change(const char *);  // Function to change
};

String::String(const char *str)
{
    size = strlen(str);
    s = new char[size+1];
    strcpy(s, str);
}

void String::change(const char *str)
{
    delete [] s;
    size = strlen(str);
    s = new char[size+1];
    strcpy(s, str);
}

int main()
{
    String str1("GeeksQuiz");
    String str2 = str1;

    str1.print(); // what is printed ?
    str2.print();

    str2.change("GeeksforGeeks");

    str1.print(); // what is printed now ?
    str2.print();
    return 0;
}

两个问题：
1.为什么字符串"GeeksQuiz"可以赋值给字符型指针？
2.为什么上述代码中void print()函数中输出内容时不要对s进行解引用？s不是个指针吗？

1和2的问题一样的，字符串是'\0'结尾的字符数组。