C++ 언어 연습문제29

[문제]

아래의 코드에서 전역변수로 선언된 변수를 static변수로 변경하여라.

#include<iostream>
using namespace std;

int simObjCnt = 0;
int cmxObjCnt = 0;

class SoSimple
{
public:
	SoSimple()
	{
		simObjCnt++;
		cout << simObjCnt << "번째 SoSimple 객체" << endl;
	}
};

class SoComplex
{
public:
	SoComplex()
	{
		cmxObjCnt++;
		cout << cmxObjCnt << "번째 SoComplex 객체" << endl;
	}
	SoComplex(SoComplex& copy)
	{
		cmxObjCnt++;
		cout << cmxObjCnt << "번째 SoComplex 복사 객체" << endl;
	}
};

int main(void)
{
	SoSimple sim1;
	SoSimple sim2;

	SoComplex com1;
	SoComplex com2 = com1;
	SoComplex();
}

 

[실행결과]

 

[코드]

#include<iostream>
using namespace std;

class SoSimple
{
private:
	static int simObjCnt;
public:
	SoSimple()
	{
		simObjCnt++;
		cout << simObjCnt << "번째 SoSimple 객체" << endl;
	}
};

int SoSimple::simObjCnt = 0;

class SoComplex
{
private:
	static int cmxObjCnt;
public:
	SoComplex()
	{
		cmxObjCnt++;
		cout << cmxObjCnt << "번째 SoComplex 객체" << endl;
	}
	SoComplex(SoComplex& copy)
	{
		cmxObjCnt++;
		cout << cmxObjCnt << "번째 SoComplex 복사 객체" << endl;
	}
};

int SoComplex::cmxObjCnt = 0;

int main(void)
{
	SoSimple sim1;
	SoSimple sim2;

	SoComplex com1;
	SoComplex com2 = com1;
	SoComplex();
}

 

<참고>

윤성우의 열혈 C++ 프로그래밍