Write code to sum the values contained in two memory slots into a third memory slot, using only 3 instructions: zero increment jlt , , where jlt=jump to if is less than .

Question

Utilisateur anonyme · Accepted Answer

import java.util.*;
public class HelloWorld {
     public static void main(String args[]) {

    String input  =  "234892";
    
    Map data = new HashMap();
    
    String[] dataFor2 = {"A", "B","C"}; 
    data.put("2",dataFor2);

    String[] dataFor3 = {"D", "E","F"}; 
    data.put("3",dataFor3);

    String[] dataFor4 = {"G", "H","I"}; 
    data.put("4",dataFor4);

    String[] dataFor5 = {"J", "K","L"}; 
    data.put("5",dataFor5);

    String[] dataFor6 = {"M", "N","O"}; 
    data.put("6",dataFor6);

    String[] dataFor7 = {"P", "Q","R","S"}; 
    data.put("7",dataFor7);

    String[] dataFor8 = {"T","U","V"}; 
    data.put("8",dataFor8);

    String[] dataFor9 = {"W", "X","Y","Z"}; 
    data.put("9",dataFor9);


    char[] myCharArray = input.toCharArray();
    
    List output = null;
    
    for (char c : myCharArray) {
    	String[] elements = data.get(c+"");
    	output = mergeList(output,elements);
	}
    
    for (String str : output) {
		System.out.println(str);
	}
    
    }

	private static List mergeList(List currentList, String[] elements) {
		if (currentList == null) {
			currentList= new ArrayList();
			for (String str : elements) {
				currentList.add(str);
			}
			return currentList;
		} else {
			List returnList= new ArrayList();
			for (String str : currentList) {
				for (String chr : elements) {
					returnList.add(str+chr);
				}
			}
			return returnList;
		}
	}
}

AS · Answer

// My algorithm would be different if I were to match this against a phonebook

import java.util.*;
public class PhoneBook {
     public static void main(String args[]) {

    String input  =  "234892"; // just an example
    
    Map data = new HashMap();
    
    String[] dataFor2 = {"A", "B","C"}; 
    data.put("2",dataFor2);

    String[] dataFor3 = {"D", "E","F"}; 
    data.put("3",dataFor3);

    String[] dataFor4 = {"G", "H","I"}; 
    data.put("4",dataFor4);

    String[] dataFor5 = {"J", "K","L"}; 
    data.put("5",dataFor5);

    String[] dataFor6 = {"M", "N","O"}; 
    data.put("6",dataFor6);

    String[] dataFor7 = {"P", "Q","R","S"}; 
    data.put("7",dataFor7);

    String[] dataFor8 = {"T","U","V"}; 
    data.put("8",dataFor8);

    String[] dataFor9 = {"W", "X","Y","Z"}; 
    data.put("9",dataFor9);


    char[] myCharArray = input.toCharArray();
    
    List output = null;
    
    for (char c : myCharArray) {
    	String[] elements = data.get(c+"");
    	output = mergeList(output,elements);
	}
    
    for (String str : output) {
		System.out.println(str);
	}
    
    }

	private static List mergeList(List currentList, String[] elements) {
		if (currentList == null) {
			currentList= new ArrayList();
			for (String str : elements) {
				currentList.add(str);
			}
			return currentList;
		} else {
			List returnList= new ArrayList();
			for (String str : currentList) {
				for (String chr : elements) {
					returnList.add(str+chr);
				}
			}
			return returnList;
		}
	}
}

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