Introduction to Computers and Applications

CS 110 Introduction to Computers and Applications

Developing Solutions to Problems

  • Programming is defined as a creative process involving:

    • Designing a solution to a problem.

    • Developing a sequence of instructions that a computer will follow to accomplish a task.

Concepts and Terms

  • Algorithm: An ordered sequence of steps designed to solve a problem.

  • IPO (Input-Process-Output): A fundamental design framework for understanding how a computer program operates.

    • Input: Data that must be entered before a computer can process it.

    • Process: Operations or calculations performed on the input data.

    • Output: The display of results after processing is complete.

    • Storage: Locations where data is held for future use, including the identification of variables.

  • Pseudo-code: A textual representation of algorithm instructions, showcasing the steps taken to solve the problem.

  • Flowchart: A diagrammatic representation of an algorithm or process, visually illustrating the sequence of steps.

  • Python Program: A set of Python statements executed in a sequence to perform the intended task.

Example Scenarios

Example #1: Sprite Movement and Calculation

  • Scenario: A user places a sprite on a stage and the sprite announces its position.

  • Flowchart Representation:

  • Program Code:
    ```python
    x = int(input("Enter int value for X: "))
    y = int(input("Enter int value for Y: " ))
    sum = x + y
    print ("sum is: ", sum)

- **Pseudo-code**:  
  1. Get x  
  2. Get y  
  3. Add x and y and store the result in sum  
  4. Display sum  
- **IPO Analysis**:  
  - **Input**: Two integers, x and y.  
  - **Processing**: Calculate the sum of x and y using the formula:  sum=x+ysum = x + y  
  - **Output**: Display the sum.  
  - **Storage**: Variables x, y, and sum.  

### Example #2: Final Price Calculation with Sales Tax  
- **Scenario**: Calculate the final price of an item including sales tax. The sprite announces the final price.  
- **Flowchart Representation**:  
- **Program Code**:

python
itemPrice = float(input("Enter item price: "))
taxRate = float(input("Enter tax rate: "))
tax = taxRate * itemPrice
finalPrice = itemPrice + tax
print ("Final Price is: ", finalPrice)
```

  • IPO Analysis:

    • Input: Two values, the item price and the tax rate.

    • Processing:

    • Calculate the tax using the formula: tax=taxRateimesitemPricetax = taxRate imes itemPrice

    • Calculate the final price using the formula: finalPrice=itemPrice+taxfinalPrice = itemPrice + tax

    • Output: The final price of the item.

    • Storage: Variables itemPrice, taxRate, and finalPrice.