K&R C Programs Exercise 5-10

Posted on January 30, 2012June 22, 2026 by Sandeepa Nadahalli

Exercise 5-10. Write the program expr, which evaluates a reverse Polish expression from the command line, where each operator or operand is a separate argument. For example, expr 2 3 4 + * evaluates 2 * (3+4). The K&R RPN calculator from Chapter 4 reads from stdin. This version reads from argv instead — each …

C Program to Demonstrate getting the parameters from the command line.

Posted on October 14, 2011June 29, 2026 by Sandeepa Nadahalli

Command line arguments let users pass data to a C program at the moment they run it — without embedding values in the source code or prompting for input. When you run ./copy src.txt dst.txt, the strings src.txt and dst.txt arrive in your program through two special parameters: argc and argv. Understanding them is essential …