/redi-ics-lesson-14-exercise

Primary LanguagePython

ICS - Lesson 14 - Recap

In this lesson we will work on small steps solving programming exercises that will eventually lead us to solve a bigger problem

Program description

Write a program that takes as an input the path to a CSV file. The CSV file will have 2 columns, operator and operand

The content of the operation can be one of the following

  • MULTIPLY
  • DIVIDE
  • SUM
  • SUBTRACT

The operand column will always represent a number. The program should have an internal variable named result with an initial value of 0.

The program should read the file line by line and execute the corresponding operation, assigning the result of this operation to the result variable

After processing the whole file the program should print the final result

Example:

Given a CSV file with the following content:

SUM,1
MULTIPLY,4
DIVIDE,2
SUBTRACT,1

The program should print the value of 1.0

$ python main.py csvs/file1.csv
1.0

Flowchart

flowchart TD
    
    style AssignResult fill:#fff2cc
    style InitResult fill:#fff2cc
    style Filepath fill:#d0e0e3
    style PrintResult fill:#d0e0e3
    style Start fill:#d9ead3
    style End fill:#d9ead3
    style MoreLines fill:#f4cccc
    style GetLines fill:#cfe2f3
    style ProcessLine fill:#cfe2f3
    
    Start(Start)
    GetLines[[Get file lines]]    
    MoreLines{More lines?}
    AssignResult[Assign result of line to to `result`]
    ProcessLine[[Process line]]
    PrintResult[/PrintResult/]
    End(End)

    Start --> Filepath[/Get filepath/] --> InitResult[Assign 0 to `result`] --> GetLines[[Get file lines]]
    GetLines --> MoreLines
    
    MoreLines --> |yes|ProcessLine--> AssignResult --> MoreLines
    MoreLines --> |no|PrintResult  --> End
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Exercises