#define?_CRT_SECURE_NO_WARNINGS
#define?_CRTDBG_MAP_ALLOC

#include?
#include
#include
#include???//用于檢測(cè)內(nèi)存泄漏

#ifdef?_DEBUG
	#ifndef?DBG_NEW
		#define?DBG_NEW?new?（?_NORMAL_BLOCK??__FILE__??__LINE__?）
	#define?new?DBG_NEW
	#endif
#endif??//?_DEBUG

using?namespace?std;
class?MyString
{
public:
	//默認(rèn)無(wú)參構(gòu)造
	MyString（）;
	//構(gòu)造函數(shù)
	MyString（int?len）;
	MyString（const?char*?s）;
	MyString（char?c?int?n）;
	MyString（const?MyString&?s）;
	//重載>>運(yùn)算符只能在類外實(shí)現(xiàn)
	friend?ostream&?operator<<（ostream&?os?MyString&?s）;
	//重載<<運(yùn)算符只能在類外實(shí)現(xiàn)
	friend??istream&?operator>>（istream&?is?MyString&?s）;
	//重載==運(yùn)算符，類外實(shí)現(xiàn)
	friend?bool?operator==（const?MyString&?s1?const?MyString&?s2）;
	//重載（）運(yùn)算符
	MyString&?operator（）（const?MyString&?str）;
	//重載=運(yùn)算符
	MyString?operator=（const?MyString&?str）;
	//重載+運(yùn)算符
	MyString?operator+（const?MyString&?str）;
	//重載[]運(yùn)算符
	char&?operator[]（int?index）;
	//重載<運(yùn)算符
	bool?operator<（const?MyString&?str2）;
	//重載<=運(yùn)算符
	bool?operator<=（const?MyString&?str2）;