How to classify the JavaScript from c++?

Question

when we study both Java and c++,we may have confusion between their scripts

Answer 1

Java and JavaScript are two different things. But I’m assuming you’re talking java. Java and c++ have different syntax. One of their biggest differences is that c++ needs both a header and source file, for example:
Ex.h
class ex {
public:
ex();
~ex();
}

Ex.cpp
ex::ex(){}
ex::~ex(){}

In java, there are no destructors. A similar version would be:
class ex {
ex(){}
}

Answer 2

Also java is a managed memory environment, meaning you don’t have to worry about memory allocation and deallocation. In c++, you have to make sure to free pointers and any other memory you use.