"Summary of C + +" new and delete for C + +

Use of the new case

When a variable is a pointer, it needs to use a space in the heap.

Running Steps for new

1. Memory allocation
2. Call constructor

Use new to open up memory space

int*pint*p2*p <<endl;//2

Can also be opened up when the initialization

int*pint(2*p <<endl;

Open up space for arrays

intnewint[10];//等于p[10]p[05;//p就是数组的首地址cout << p[0] <<endl;

Objects open up space

Person *person = new Person();

Using the Delete

Objects open up the content space in the heap and need to release the application space when not in use.

delete p//释放变量delete  []p//释放数组delete person//释放对象

Delete Run step

1. Call destructor
2. Freeing memory

"Summary of C + +" new and delete for C + +