The release of object memory for class C

I don't know if you know anything about memory allocation.

Depending on how your object is instanced, if the direct instance is allocated on the stack without new memory, then you don't need to worry about the space that the class occupies will have its own memory at the end of the object's lifecycle.

If it's new, then the memory is allocated on the heap, and if you don't delete the class with delete, then the memory will be leaked.

If you say, It's not new, point out with a pointer, and then release, I don't know if that's the case.

class a{};

a newa_one;

a* newptr;

newptr = &newa_one;

It's okay to point to this pointer, but you can't use delete to release it, because the object address is on the stack, and the object lifecycle is in the area where the object is used.

If your class object is new, you can delete.

Whether or not you can "release directly" depends on how your program is written.

Only new can be deleted, and only malloc can be free

Didn't understand what to ask.

Normal to be. 1. Delete database data.

2. Delete class objects.

The method of operating the two together has this function in the SDK.

1. This paragraph ** is wrong and crashes after running.

void check_leak(double *p, int num);

check_leak(q,5);

This pointer is passed by value, and in fact the p inside the check leak function does not affect the q outside. So the program creates a new array, and then destroys a memory ...... that I don't know **

2. It is feasible to apply for memory in a function and release it outside the function. Because the applied memory is on the heap, it is valid throughout the program.

However, it is not recommended. Applying releases should appear in pairs in the same scope, otherwise it's easy to carelessly forget delete.

Yes, just control it and don't release it repeatedly.

If you apply for it yourself, you need to release the memory. If you're just a local variable, like an int defined like this

arr[10000][10000], it does not need to be released. The system will release it automatically.