This challenge is related to the C language. Note that challenges that require the answers to be in a specific language are generally discouraged.
C is a general-purpose computer programming language used for operating systems, games and other high performance work and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for use with the Unix operating system.
A C compiler is available here: https://gcc.gnu.org/install/download.html