Why C++ is needed?

Answer 1

http://www.bestprogramminglanguagefor.me/why-learn-c-plus-plus

Answer 2

It's useful because you can create objects, representing real world objects, or useful abstract objects.

Example, you could create an object called WashProgramme, which represented the wash cycle of a washing machine.

WashProgramme* wp = new WashProgramme();

wp->set_temperature(40);
wp->set_wash_type(COLOURS);
wp->start_cycle ();

This makes it easier to understand and test the code in some ways.