#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?