C++类与new和delete操作符

new和delete操作符

操作符 delete 和 delete[] 在释放对象存储空间的同时也会调用析构函数，而 free() 函数则不会调用析构函数。

#include<iostream>
using namespace std;

class test
{
public:
    test(int i = 1)
    {
        num = i;
        cout<<num<<" Constructor"<<endl;
    }

    ~test()
    {
        cout<<num<<" Destructor"<<endl;
    }
private:
    int num;
};

int main()
{
    test * t0 = new test(0);
    test * t1 = new test[5];
    test * t2 = (test *)malloc(sizeof(test));

    cout << "t0 delete..." << endl;
    delete t0;

    cout << "t1 delete..." << endl;
    delete[] t1;

    cout << "t2 free..." << endl;
    free(t2);
    return 0;
}