TermChat is a simple terminal based chat program for users logged into the same machine, using the curses library and shared-memory IPC.

Ensure that your system has ncurses library installed.

In case it is not, run sudo apt-get install libncurses5-dev for Ubuntu-like systems and,

sudo dnf install ncurses-devel for Fedora/Red Hat like systems.

Run the compiler with the lcurses or lncurses switch to link against the curses library.

On mac: gcc -lncurses main.c

Ensure that you add the switch after the name of the C program. This is because object files and libraries are linked in order in a single pass.