🖩 calculator

Group project : create a calculator inside console

📝 Instruction

1. User inputs their operation for integer or floats freely
2. Simple operators are allowed : + - / *
3. The algorithm is able to calculate the user's operation and return the result
4. Management of errors (wrong input, impossible operations)...
5. bonus : display the history of operation. The user can erase the history if they wish

the math module and eval() function are forbidden

👥 Group members

• Jolyne Mangeot
• Eltigani Abdallah
• AdelinePat

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🚀 Features

• input operation at once:
  • regular expression used for user's input (re library)
  • get a list of number (int and float) and operators, return an error if anything else is written
  • check the start of the list, return an error if it doesn't start with a number, + or -
  • Add 0 if list starts with + or -
• calculate:
  • simple operation
  • update operation list by inserting the result inside original list and then remove from list both operand and operator
  • complex operation with parenthesis (create a sublist inside original list in order to calculate inside the sublist first)
  • return ZeroDivisionError when user tries to divide by 0
• display:
  • ansi escape sequencies enable user-friendly display inside console
• operations' record:
  • The last four operations are saved and displayed using a list
  • Clearing record is possible
• exit algorithm:
  • off command let user stop main algorithm without error
  • ctrl+c let user stop main algorithm without error

📂 Directories and files

• calc_display directory : contains all files related to display calculator inside console
• operations directory : contains all files related to the treatment of input and actual mathematical operations

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