/**
 * Prints out ASCII characters in a table to demonstrate their unsigned integer
 * equivalents. 
 * @author Sarah Larkin
 * CS3090, Spring 2018
 * Date Last Modified: March 3, 2018
 */
public class ASCII_Viewer {

	public static void main(String[] args) {
		ASCII_Viewer self = new ASCII_Viewer();
		self.printAllACSII();
		self.printDisplayableASCII();
		/* Print a "character" that is out of the ASCII range
		 * It displays as a question mark.
		 */
		System.out.println("128: " + (char)128);
		
		// Print out the sum of 'a' + 'A'
		System.out.println("a + A = " + self.sumASCII('a', 'A'));
		
		// Print out the product of 'a' + 'A'
		System.out.println("a * A = " + 'a' * 'A');
	}
	
	/**
	 * Prints out all 128 ASCII characters - 63 is authentically the question mark
	 */
	public void printAllACSII() {
				System.out.println("All ASCII characters");
				for (int i = 0; i < 128; i++) {
					System.out.print(i + ": " + (char)i + " ");
					// Print a new line after every five characters
					if (i > 0 && i  % 5 == 0) {
						System.out.println();
					}
				}
				System.out.println();
	}
	
	/**
	 * Prints out only the displayable ASCII characters
	 */
	public void printDisplayableASCII() {
		System.out.println("Displayable ASCII characters");
		for(int i = 32; i < 127; i++) {
			System.out.print(i + ": " + (char)i + "\t");
			// Print a new line after every five characters
			if ((i - 31) % 5 == 0) {
				System.out.println();
			}
		}
	}
	
	/**
	 * Adds two characters together and returns the value as an int
	 * @param ch1 the first character
	 * @param ch2 the second character
	 * @return the sum as an integer
	 */
	public int sumASCII(char ch1, char ch2) {
		return ch1 + ch2;
	}

}