how to delete and replace a variable in an array for c++?

Answer 1

I'm not getting what you mean by "replace a variable in an array" can you provide an example?

And please tag C++ instead of '#rsv', unless you can explain the relevance of '#rsv' to your question topic.

Answer 2

If what you are trying to say is:How to delete and replace an element in an array for c++. The answer is:
You can't delete an element of an array, if that is a regual one:

int Array[10];

Though you can replace elements by simply replacing their values.

Array[2]=14;

If you want to replace a whole variable you can make an array of pointers instead:

int a,b,c,d,e,f;
int* arr[5]={&a,&b,&c,&d,&e};

Now all you have to do to replace one is:

arr[2]=&f; //replacing &c with &f

As for deleting using dynamic arrays (std::vector) is the best option

Answer 3

Also keep in mind that the only way to delete data stored on stack is only if its lifetime ends for example:

int a,b,c;
int* Array[4]={&a,&b,&c,nullptr};

{
int d;
Array[3]=&d;
}

//Now Array[3] is a dangling pointer, since d was deleted once it exited the scope