CODE:

#include
#include

class CSample{
public:
	CSample() : num(0){
		std::cout
#include

class CSample{
public:
	CSample() : num(0){
		std::cout<<"constructor without any parameter"<<std::endl;
	}
	CSample(int num_) : num(num_){
		std::cout<<"contructor with one parameter"<<std::endl;
	}
	~CSample(){
		std::cout<<"destructor"<<std::endl;
	}
	int getNum()const{
		return num;
	}
private:
	int num;
};

int main(){
	CSample sample;
	std::cout << sample.getNum()<<std::endl;
	sample.~CSample // ←ここでデストラクタを明示的に呼び出す。
	new(&sample)CSample(100);
	std::cout << sample.getNum()<<std::endl;
}