C++随笔——悬空指针

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悬空指针： 指向不定内存的指针

#include <iostream>
int main(void){
	int a;
	double* p1 = new double(4.6);
	double* p2 = p1;
	std::cout << p1 << std::endl;
	std::cout << p2 << std::endl;
	*p2 = 3;
	delete p1;
	std::cout << p1 << std::endl;
	std::cout << p2 << std::endl;
	std::cout << *p2 << std::endl;
	std::cout << *p1 << std::endl;
	std::cin >> a;
	return 0;
}