CS50 Solutions

About CS50x

CS50x is online version of Harvard's introductory course on computer science (course website). The repository contains my solutions to the course assignments. Some parts of the programs are boilerplates provided by the course.

Week 1: C

Problem Set 1

• Credit

  Program requests a number from user and determines whether it is a valid ceridt card number.

Week 2: Arrays

Problem Set 2

• Readability

  Determine the reading level of a text according to Coleman-Liau index

• Substitution

  Implements a program for (de)ciphering text with substitution cipher.

Week 3: Algorithms

Problem Set 3

• Plurality

  The program simulates a plurality vote election

• Tideman

  The program simulates a Tideman election

Week 4: Memory

Problem Set 4

• Filter

  Implments a program that applies filters (greyscale, reflection, blur and edges) to BMPs

• Recover

  Implements a program that recovers JPEGs from a forensic image

Week 5: Data Structures

Problem Set 5

• Speller

  Implements a spell-checker

Week 6: Python

Problem Set 6

• Credit

  Reimplements credit.c in Python

• Readability

  Reimplements readability.c in Python

• DNA

  Implements a program that identifies a person based on their DNA

Week 7: SQL

Problem Set 7

• Movies

  Set of SQL queries to answer questions about IMDB database

Houses

Implement a program to import student data into a database, and then produce a class roster

• Import

  Imports data from a CSV spreadsheet

• Roster

  Prints a list of students for a given house in alphabetical order

Week 8: Information

Web Track

• Homepage

  Implements a simple homepage with the use of HTML, CSS, and JavaScript

• Finance

  Implement a website via which users can “buy” and “sell” and track their stocks

Final Project