Like the title, I want to know about the purpose of c++, is it the c++ is a component in order to make a software (eg: os etc), please experts give a quick hint about what is the purpose of c++, thanks.
C++ is a language that humans can understand which communicates instructions to a program called a compiler which converts human-readable code into a string of ones and zeroes which is the only thing a machine can understand, but which is impractical for people to work with (since trying to make sense of a billion pages of ones and zeroes would make you insane).
It is a language with a few dozen words which, once you learn it, you will be able to incorporate pre-written sets of instructions (libraries) into larger and more complex programs to do whatever you want it to do, from outputting graphics or making a game or storing data or a thousand other things.
Similarly html is a language that is easy for humans to understand which gives instructions to a web browser which tell it how to display data on a webpage, what size to make the text, where to put it, what font to use, how big the images should be and so on.