How do you write a geometric c program?

To write a geometric C program, start by including the necessary header files, such as <stdio.h> for input and output. Define functions for calculating geometric properties, like area and perimeter, for different shapes (e.g., circle, rectangle). In the main() function, prompt the user for shape dimensions, call the appropriate functions, and display the results. Ensure proper handling of user inputs and include necessary validations for a robust program.