C ++中的删除和调用析构函数之间有什么区别 [英] What is the difference between delete and calling destructor in C++

问题描述

如标题中所述，这是我的代码：

As stated in the title, here is my code:

class Foo {

    public:
        Foo (int charSize) {
            str = new char[charSize];
        }
        ~Foo () {
            delete[] str;
        }
    private:
        char * str;
};

对于本课程，这之间的区别是：

For this class what would be the difference between:

int main () {
    Foo* foo = new Foo(10);
    delete foo;
    return 0;
}

和

int main () {
    Foo* foo = new Foo(10);
    foo->~Foo();
    return 0;
}

推荐答案

调用析构函数会释放资源由对象拥有，但不会释放分配给对象本身的内存。第二个代码段内存泄漏。

Calling a destructor releases the resources owned by the object, but it does not release the memory allocated to the object itself. The second code snippet has a memory leak.

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