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| class MyString {
private:
char* _data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len+1];
memcpy(_data, s, _len);
_data[_len] = '\0';
}
public:
MyString() {
_data = NULL;
_len = 0;
}
MyString(const char* p) {
_len = strlen (p);
_init_data(p);
}
MyString(const MyString& str) {
_len = str._len;
_init_data(str._data);
std::cout << "Copy Constructor is called! source: " << str._data << std::endl;
}
MyString& operator=(const MyString& str) {
if (this != &str) {
_len = str._len;
_init_data(str._data);
}
std::cout << "Copy Assignment is called! source: " << str._data << std::endl;
return *this;
}
virtual ~MyString() {
if (_data) free(_data);
}
};
int main() {
MyString a;
a = MyString("Hello");
std::vector<MyString> vec;
vec.push_back(MyString("World"));
}
|