Building on C
C++ grew from C and added ways to organise larger programs. It is used in software such as game engines, desktop applications, and parts of operating systems. Developers can manage memory and other resources closely when the speed or size of a program matters.
That control also gives a team more decisions to make and more opportunities for mistakes. Despite the shared letter, C++ and C# are different languages; knowing which one a project uses matters when choosing tools or hiring developers.