Created default sentinal loop values and input menu options.

This commit is contained in:
Jonathan Turner 2024-02-15 13:04:08 -05:00
parent b935c1f10e
commit a66a462ced

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@ -37,16 +37,109 @@ Algorithm Design Block
*/ */
package Assignments.A2; package Assignments.A2;
import java.util.Scanner;
/** /**
* Performs a brute force/exhaustive search for * Performs a brute force/exhaustive search for
* how many substrings start with A and end with B. * how many substrings start with A and end with B.
* *
* @author Jonathan Turner * @author Jonathan Turner
* @version Spring 2024
*/ */
public class Substrings { public class Substrings {
/**
* Used as the main sentential loop and loops until the exit option is selected.
*
* @precondition none
* @postcondition none
*/
public void start() {
int option = this.getOption();
while (option != 3) {
this.executeOption(option);
option = this.getOption();
}
}
/**
* Performs the action related to the option that was chosen.
*
* @precondition none
* @postcondition the action was performed.
*
* @param option the option that was chosen.
*/
private void executeOption(int option) {
performAlgorithm();
}
/**
* Uses private fields to generate the number of subsets and comparisons.
*
* @precondition text != null && text != empty
* @postcondition the results are generated.
*/
private void performAlgorithm() {
}
/**
* Prints out the menu of options, asks for an input, and if that input is invalid it prints an error and
* prompts the user again for the input.
*
* @precondition none
* @postcondition none
*
* @return the option selected
*/
private int getOption() {
this.displayMenu(); // Prints out the menu
// Asks for the option and begins the loop until a valid option is gathered.
System.out.print("Enter option number: ");
int input = getIntegerInput();
while (input < 1 || input > 3) { // Compares it to the valid options available.
System.out.println("\nPlease enter a valid input.");
System.out.print("Enter option number: ");
input = getIntegerInput();
}
System.out.println();
return input;
}
/**
* Displays the menu options.
*
* @precondition none
* @postcondition the menu is displayed.
*/
private void displayMenu() {
System.out.println("-----------------MAIN MENU--------------");
System.out.println("1. Read input string");
System.out.println("2. Run algorithm and display outputs");
System.out.println("3. Exit program");
System.out.println();
}
/**
* Gets user input to a number. A prompt must be provided prior to running this method.
* If the input was not an integer/(unable to be autoboxed), returns -1.
*
* @precondition none
* @postcondition none
*
* @return the integer input, if invalid -1.
*/
protected int getIntegerInput() {
Scanner sc = new Scanner(System.in);
try {
String textInput = sc.nextLine();
return Integer.parseInt(textInput);
} catch (Exception e) {
return -1;
}
}
} }