Infix to Postfix Conversion and Evaluation in C – With Example

Posted on August 8, 2017June 23, 2026 by Sandeepa Nadahalli

Infix notation is the way humans write arithmetic: A + B, 5 * (2 + 3). The operator sits between its operands. Computers, however, evaluate expressions more efficiently in postfix notation (also called Reverse Polish Notation), where the operator comes after its operands: A B +, 5 2 3 + *. This C program does …

Infix to Postfix Conversion in C – Shunting-Yard Algorithm

Posted on October 11, 2011June 23, 2026 by Sandeepa Nadahalli

Infix to postfix conversion in C transforms a human-readable arithmetic expression like A + B * C into postfix notation A B C * +, where operators follow their operands. Postfix eliminates the need for parentheses and precedence rules during evaluation — a stack scan from left to right is all that’s needed. This page …