Infix Expression: The expression of the form a op b. When an operator is in-between every pair of operands.
Example: ( (A * B) + (C / D) )
Prefix Operation: An expression is called the prefix expression if the operator appears in the expression before the operands. Simply of the form (operator operand1 operand2)
Example: (+ (* A B) (/ C D) )
Postfix Expression: The expression of the form a b op. When an operator is followed for every pair of operands.
Example: ( (A B *) (C D /) +)
Convert an Infix Expression to a Postfix Expression
Hint: https://www.geeksforgeeks.org/stack-set-2-infix-to-postfix/
Convert an Infix Expression to a Prefix Expression
Hint: https://www.geeksforgeeks.org/infix-to-prefix-conversion-using-two-stacks/
Convert an Postfix Expression to a Infix Expression
HINT: https://www.geeksforgeeks.org/postfix-to-infix/
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