Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Concept explainers

Types of Function
A function is a process or task that does some operation in the program. Some programming languages may contain built-in functions for certain commonly used tasks. Most programming languages also support user-defined functions, which means a user can wri…
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### Problem #2: Write a Simple Calculator Write a program named Calculator. This program must have 6 functions. Failure to follow these requirements will result in a failing grade on the assignment even if it passes all tests: 1. **main()**: Controls the flow of the program. main() only needs the following two lines of code (all other methods are called in the userOutput() function): ``` num1, num2 = userInput() userOutput(num1, num2) ``` 2. **userInput()**: - Asks the user to enter two numbers. - Ensure (with a loop) that the second number is not zero. 3. **add()**: - Accepts two numbers, returns the sum. 4. **subtract()**: - Accepts two numbers, returns the difference of the first number minus the second number. 5. **multiply()**: - Accepts two numbers, returns the product. 6. **divide()**: - Accepts two numbers, returns the quotient of the first number divided by the second number. 7. **modulo()**: - Accepts two numbers, returns the modulus of the first number divided by the second number. 8. **exponent()**: - Accepts two numbers, returns the first number raised to the power of the second number. 9. **userOutput()**: - Accepts the two numbers from main and calls the other six functions to print their results. Make your output look like the provided example (identical formatting of output), but work with any numbers entered. Remember that you must handle any valid numeric input. Be sure to test with 0, negative, and positive integers! --- **Sample Output:** ``` You are not expected to handle the input of strings. Enter your first number: 5 Enter your second number (other than zero): 0 Here is the 6 for the second number Enter your second number (other than zero): 5.0 5.0 + 5.0 = 10.0 5.0 - 5.0 = 0.0 5.0 * 5.0 = 25.0 5.0 / 5.0 = 1.0 5.0 % 5.0 = 0 5
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Transcribed Image Text:### Problem #2: Write a Simple Calculator Write a program named Calculator. This program must have 6 functions. Failure to follow these requirements will result in a failing grade on the assignment even if it passes all tests: 1. **main()**: Controls the flow of the program. main() only needs the following two lines of code (all other methods are called in the userOutput() function): ``` num1, num2 = userInput() userOutput(num1, num2) ``` 2. **userInput()**: - Asks the user to enter two numbers. - Ensure (with a loop) that the second number is not zero. 3. **add()**: - Accepts two numbers, returns the sum. 4. **subtract()**: - Accepts two numbers, returns the difference of the first number minus the second number. 5. **multiply()**: - Accepts two numbers, returns the product. 6. **divide()**: - Accepts two numbers, returns the quotient of the first number divided by the second number. 7. **modulo()**: - Accepts two numbers, returns the modulus of the first number divided by the second number. 8. **exponent()**: - Accepts two numbers, returns the first number raised to the power of the second number. 9. **userOutput()**: - Accepts the two numbers from main and calls the other six functions to print their results. Make your output look like the provided example (identical formatting of output), but work with any numbers entered. Remember that you must handle any valid numeric input. Be sure to test with 0, negative, and positive integers! --- **Sample Output:** ``` You are not expected to handle the input of strings. Enter your first number: 5 Enter your second number (other than zero): 0 Here is the 6 for the second number Enter your second number (other than zero): 5.0 5.0 + 5.0 = 10.0 5.0 - 5.0 = 0.0 5.0 * 5.0 = 25.0 5.0 / 5.0 = 1.0 5.0 % 5.0 = 0 5
--- ### Problem #1: Problem #5 - Revisit the MixColors --- Take your answer from Week 3 Wednesday for the MixColors program. We will split this into methods. Write a program named `ColorFunction` that does exactly the same thing but has the following three functions: 1. **main()**: This function will ask the user to enter two primary colors and pass these values to the function `mixColors()`. It will then accept a return from `mixColors()`. 2. **mixColors()**: This function accepts two primary colors and determines the created secondary color. This color is returned. If it was not valid, return the string "not valid". 3. **printValue()**: This void function accepts a single string of the secondary color or "not valid" and prints the color or the message "You did not enter two primary colors". --- #### Sample Output Run #1 ``` Enter the first primary color (small letters): red Enter the second primary color (small letters): blue You will get purple ``` #### Sample Output Run #2 ``` Enter the first primary color (small letters): red Enter the second primary color (small letters): red You did not enter two primary colors ``` --- NOTE: Both this program and the one from week 3 get identical output, but programs with small functions like this are easier to maintain and understand.
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Transcribed Image Text:--- ### Problem #1: Problem #5 - Revisit the MixColors --- Take your answer from Week 3 Wednesday for the MixColors program. We will split this into methods. Write a program named `ColorFunction` that does exactly the same thing but has the following three functions: 1. **main()**: This function will ask the user to enter two primary colors and pass these values to the function `mixColors()`. It will then accept a return from `mixColors()`. 2. **mixColors()**: This function accepts two primary colors and determines the created secondary color. This color is returned. If it was not valid, return the string "not valid". 3. **printValue()**: This void function accepts a single string of the secondary color or "not valid" and prints the color or the message "You did not enter two primary colors". --- #### Sample Output Run #1 ``` Enter the first primary color (small letters): red Enter the second primary color (small letters): blue You will get purple ``` #### Sample Output Run #2 ``` Enter the first primary color (small letters): red Enter the second primary color (small letters): red You did not enter two primary colors ``` --- NOTE: Both this program and the one from week 3 get identical output, but programs with small functions like this are easier to maintain and understand.
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