Programming can be fun, so can cryptography, however they should not be combined. Kreitzberg and Shneiderman
Infix and postfix are the notations to write the expressions. The infix notation put operators in between the operands. The postfix notation put operators after their operands. Write a program convert from infix notation to postfix notation.
Infix (5 + 3) * 12 / 3
Postfix: 5 3 + 12 * 3 /
Infix : 1+3*4/5 Postfix : 134*5/+