Postfix-Calculator-Application

Course Project (COL106) under Prof. Subodh Sharma [August 2023] : Designed a robust calculator app using various stack implementations, object-oriented programming principles, expression tokenization, post-fix notation evaluation, and strong error handling

Types of Stack Implementation

stack_a : via fixed size arrays,

stack_b : via dynamic arrays,

stack_c : via linked lists

Commands Explanation

Let’s walk through each of the command one-by-one.

1. Insert 1 {set num} {data} This command will have 2 arguments. The set num indicates which set needs to be operated on (if set with this number does not exist already, then create it). ”data” indicates the data to be inserted into the set. Remember that after the insertion of data, the set properties must hold - specifically, the set should have unique elements in sorted order
2. Delete 2 {set num} {data} Similar to insert. In this case, if set with this number does not exist, return -1. One thing to note here is that - if the data to be deleted does not exist in the set, then do nothing and just print the original size of the set.
3. Belongs To 3 {set num} {data} Check if the element ”data” belongs to the set ”set num”. If set does not exist, return -1. Return 1 if it belongs, else return 0.
4. Union 4 {set num1} {set num2} Note that you need to store the result of union operation in set num1 (This means that set num2 will remain unchanged, unless set num1 is same as set num2). Ensure that the set properties hold even after union. If either of the sets doesn’t exist - create them.
5. Intersection 5 {set num1} {set num2} Similar instructions as Union.
6. Size 6 {set num} If set doesn’t exist, create and return 0.
7. Difference 7 {set num1} {set num2} If either of the sets doesn’t exist, create it. Store the result in set num1. (Again, don’t modify set num2)
8. Symmetric Difference 8 {set num1} {set num2} Instructions similar to Difference.
9. Print 4 {set num} Given the set number, print all its elements as comma-separated values. Do not include any whitespaces (Just include a linebreak at the end). Should Look Like - 1, 2, 3, 5, 7 If the set does not exist, just print a linebreak.