simple calculator

K&R C Programs Exercise 4-3

Posted on by Sandeepa Nadahalli

Exercise 4-3. Given the basic framework, it’s straightforward to extend the calculator. Add the modulus (%) operator and provisions for negative numbers. This exercise extends the RPN desk calculator from K&R Section 4.3. Two independent additions: Modulus operator % — pop two operands, cast to int, apply %, push result. Floating-point modulus is mathematically well-defined …

Simple Calculator in C Using Switch Statement – All 4 Operations

Posted on by Sandeepa Nadahalli

A simple calculator in C using switch statement reads an operator character (+, -, *, /) and dispatches to the correct arithmetic operation. The switch statement is ideal here: each operator maps to exactly one case, with a default branch catching anything unsupported. This program also demonstrates proper division-by-zero handling — an error that causes …