#ifndef __MYCOMPLEX__
#define __MYCOMPLEX__

class Complex {
public:
	Complex(double r = 0, double i = 0) :m_real(r), m_imag(i) {}
	double real() const { return m_real; }
	double imag() const { return m_real; }

private:
	double m_real;
	double m_imag;
};

#endif

Complex* pc = new Complex(1,2);//Complex為類名（復(fù)數(shù)）

void* men= operator new( sizeof(Complex));//第一步，分配內(nèi)存
pc = static_cast<Complex*>(men);//第二步，轉(zhuǎn)型
pc->Complex :: Complex(1,2);//第三步，調(diào)用構(gòu)造函數(shù)

delete pc;

Complex::~Complex(pc);//析構(gòu)函數(shù)
operator delete(pc);//釋放內(nèi)存

int main() {
	Complex* pc = new Complex(1, 2);
	cout << pc->imag() << ":" << pc->real() << endl;
	delete pc;
	system("pause");
	return 0;
}

#ifndef __MYSTRING__
#define __MYSTRING__

#include <string>

class MyString {
public:
	MyString(const char* cstr = 0) {
        if (cstr) {
            m_data = new char[strlen(cstr) + 1];
            strcpy(m_data, cstr);
        }
        else {
            m_data = new char[1];
            *m_data = '\0';
        }
	}
    ~MyString() {
        delete[] m_data;
    }
    char* get_c_str() const { return m_data; }
private:
    char* m_data;
};

#endif

MyString* ps = new MyString("Hello");

void* men= operator new( sizeof(MyString));//第一步，分配內(nèi)存
ps = static_cast<MyString*>(men);//第二步，轉(zhuǎn)型
ps->MyString:: MyString("Hello");//第三步，調(diào)用構(gòu)造函數(shù)

delete ps;

MyString::~MyString(ps);//析構(gòu)函數(shù)
operator delete(ps);//釋放內(nèi)存

int main() {

	MyString* ps = new MyString("Hello");

	cout << ps->get_c_str() << endl;

	delete ps;

	system("pause");
	return 0;
}