stuck again

question 6.17 Deitel & Deitel...
the twelve days of christmas song. Write an application that uses repitition and if structures to print the song "the twelve days of christmas". After spending a couple of days trying different techniques
(from my limited repertoire) the code i came up with was...

Code:

---

using System;

class Class1
{
       
        // main entry point for the application
        static void Main(string[] args)
        {
                string[,] stringArray = { {"this"}, {"is"}, {"a test"},
                                                                {"to see"}, {"how i can"}, {"impliment"},
                                                                {"repetition"}, {"and if structures"},
                                                                {"to print"}, {"this text"}};

               
                for(int loop=0; loop<stringArray.Length; loop++)
                {
                        //if (stringArray.Length>0)
                                Console.WriteLine(stringArray[loop, 0]);
                }

               
        }
}

---

which works using a double subscripted array and looping through the first subscript, however, it doesnt fullfill the requirements, it still works with the if statement but i know thats not right using the same condition as in the for loop. in my search on this board i found the 2003 xmas song competition and had a look at the various efforts (some really bizarre code), however the competition did not have the same requirements as this question and i could not find any other person who had asked about this problem from this board (i hate saying that because i know someone will now say, oh yeah, i just spent 2 minutes searching and i found this....) but i didnt, Breezer's efforts amazed me even if i didnt fully understand what was going on. And something really wierd happenned when i annotated his code

Code:

---

// 12Scramble.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <string>
#include <cmath>


using namespace std;


int main(int argc, char* argv[])
{
  char a;
  int b = 0;
  int c = 0;
  int e;
 
  string d = "11110010011101100000010000101110000101101010011000000100011001101001011001001110110011100010111000000100001001101000011010011110000001001111011001100110000001001100011000010110010011101001011011001110001011101011011010000110110011100000010010110110100111100000010000101110010011101010111010100110000001000011011011110110011011101010011000000100110011101010011001110110001011100000010000101110111101100000010010110110101001100101000010000010000001000000111010000110010011100010111001001110100101100010011011100110101001100000010010010110011101100000010010000110000001000000111010100110100001100100111000000100001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010011001110101001101100011011110110011101100010011000000100001001101000011010011110000001001111011001100110000001001100011000010110010011101001011011001110001011101011011010000110110011100000010010110110100111100000010000101110010011101010111010100110000001000011011011110110011011101010011000000100110011"
  "10101001100111011000101110000001000010111011110110000001001011011010100110010100000010101011101110111101100000010000101110101011100100111000101110001101101010011000000100001001101111011001101110101001101100111000000100100001100111011000100110010100001000001000000100000011101000011001001110001011100100111010010110001001101110011010100110000001001001011001110110000001001000011000000100000011101010011010000110010011100000010000101110010011101010011010100110011101000101000001010000111100100111011000000100001011100001011010100110000001000010111000010110100101100100111000100110000001000010011010000110100111100000010011110110011001100000010011000110000101100100111010010110110011100010111010110110100001101100111000000100101101101001111000000100001011100100111010101110101001100000010000110110111101100110111010100110000001001100111010100110011101100010111000000100001011101111011000000100101101101010011001010000001010100001011001001110101001101010011000000100011001100100111010100110011101101100011000010110000001000001"
  "01101010011001110110110011100101000000101010111011101111011000000100001011101010111001001110001011100011011010100110000001000010011011110110011011101010011011001110000001001000011001110110001001100101000010000010000001000000111010000110010011100010111001001110100101100010011011100110101001100000010010010110011101100000010010000110000001000000111010100110100001100100111000000100001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010001100110111101101010111001001110001011100001011000000100001001101000011010011110000001001111011001100110000001001100011000010110010011101001011011001110001011101011011010000110110011100000010010110110100111100000010000101110010011101010111010100110000001000011011011110110011011101010011000000100110011101010011001110110001011100000010000101110111101100000010010110110101001100101000001100010111101101010111001001110000001001100011011110110001101100011011010011110000001000100011010010110010011100010011011001110010100000010101000"
  "01011001001110101001101010011000000100011001100100111010100110011101101100011000010110000001000001011010100110011101101100111001010000001010101110111011110110000001000010111010101110010011100010111000110110101001100000010000100110111101100110111010100110110011100000010010000110011101100010011001010000100000100000010000001110100001100100111000101110010011101001011000100110111001101010011000000100100101100111011000000100100001100000010000001110101001101000011001001110000001000010111001001110101001101010011001110100010100000101000011110010011101100000010000101110000101101010011000000100011001101001011001100110001011100001011000000100001001101000011010011110000001001111011001100110000001001100011000010110010011101001011011001110001011101011011010000110110011100000010010110110100111100000010000101110010011101010111010100110000001000011011011110110011011101010011000000100110011101010011001110110001011100000010000101110111101100000010010110110101001100101000001100010100101100110111010100110000001001110011011110110"
  "00110110001001100000010001001110100101100111011011100110110011100101000001100010111101101010111001001110000001001100011011110110001101100011011010011110000001000100011010010110010011100010011011001110010100000010101000010110010011101010011010100110000001000110011001001110101001100111011011000110000101100000010000010110101001100111011011001110010100000010101011101110111101100000010000101110101011100100111000101110001101101010011000000100001001101111011001101110101001101100111000000100100001100111011000100110010100001000001000000100000011101000011001001110001011100100111010010110001001101110011010100110000001001001011001110110000001001000011000000100000011101010011010000110010011100000010000101110010011101010011010100110011101000101000001010000111100100111011000000100001011100001011010100110000001001100111010010110000111100010111000010110000001000010011010000110100111100000010011110110011001100000010011000110000101100100111010010110110011100010111010110110100001101100111000000100101101101001111000000100001011"
  "10010011101010111010100110000001000011011011110110011011101010011000000100110011101010011001110110001011100000010000101110111101100000010010110110101001100101000011001010100101100001111000000100111001101010011010100110110011101010011000000100001101101000011010011110100101100111011011100110010100000110001010010110011011101010011000000100111001101111011000110110001001100000010001001110100101100111011011100110110011100101000001100010111101101010111001001110000001001100011011110110001101100011011010011110000001000100011010010110010011100010011011001110010100000010101000010110010011101010011010100110000001000110011001001110101001100111011011000110000101100000010000010110101001100111011011001110010100000010101011101110111101100000010000101110101011100100111000101110001101101010011000000100001001101111011001101110101001101100111000000100100001100111011000100110010100001000001000000100000011101000011001001110001011100100111010010110001001101110011010100110000001001001011001110110000001001000011000000100000011101010"
  "01101000011001001110001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010011001110101001100110111010100110011101100010111000010110000001000010011010000110100111100000010011110110011001100000010011000110000101100100111010010110110011100010111010110110100001101100111000000100101101101001111000000100001011100100111010101110101001100000010000110110111101100110111010100110000001001100111010100110011101100010111000000100001011101111011000000100101101101010011001010000110010101010011001101110101001100111011000000100110011101110111010000110011101101100111000000100110011101110111010010110101101101011011010010110011101101110011001010000110010101001011000011110000001001110011010100110101001101100111010100110000001000011011010000110100111101001011001110110111001100101000001100010100101100110111010100110000001001110011011110110001101100010011000000100010011101001011001110110111001101100111001010000011000101111011010101110010011100000010011000110111101100011011000"
  "11011010011110000001000100011010010110010011100010011011001110010100000010101000010110010011101010011010100110000001000110011001001110101001100111011011000110000101100000010000010110101001100111011011001110010100000010101011101110111101100000010000101110101011100100111000101110001101101010011000000100001001101111011001101110101001101100111000000100100001100111011000100110010100001000001000000100000011101000011001001110001011100100111010010110001001101110011010100110000001001001011001110110000001001000011000000100000011101010011010000110010011100000010000101110010011101010011010100110011101000101000001010000111100100111011000000100001011100001011010100110000001001010011010010110111001100010111000010110000001000010011010000110100111100000010011110110011001100000010011000110000101100100111010010110110011100010111010110110100001101100111000000100101101101001111000000100001011100100111010101110101001100000010000110110111101100110111010100110000001001100111010100110011101100010111000000100001011101111011000000100"
  "10110110101001100101000010100010100101101110011000010110001011100000010010110110100001101001011000100110110011100000010010110110100101100011011011010110100101100111011011100110010100001100101010100110011011101010011001110110000001001100111011101110100001100111011011001110000001001100111011101110100101101011011010110110100101100111011011100110010100001100101010010110000111100000010011100110101001101010011011001110101001100000010000110110100001101001111010010110011101101110011001010000011000101001011001101110101001100000010011100110111101100011011000100110000001000100111010010110011101101110011011001110010100000110001011110110101011100100111000000100110001101111011000110110001101101001111000000100010001101001011001001110001001101100111001010000001010100001011001001110101001101010011000000100011001100100111010100110011101101100011000010110000001000001011010100110011101101100111001010000001010101110111011110110000001000010111010101110010011100010111000110110101001100000010000100110111101100110111010100110110011"
  "10000001001000011001110110001001100101000010000010000001000000111010000110010011100010111001001110100101100010011011100110101001100000010010010110011101100000010010000110000001000000111010100110100001100100111000000100001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010001110110100101100111011000101110000101100000010000100110100001101001111000000100111101100110011000000100110001100001011001001110100101101100111000101110101101101000011011001110000001001011011010011110000001000010111001001110101011101010011000000100001101101111011001101110101001100000010011001110101001100111011000101110000001000010111011110110000001001011011010100110010100000111001010010110011101101010011000000100001001100100111010101110101101101011011010100110010011101100111000000100001001100100111010101110101101101011011010010110011101101110011001010000101000101001011011100110000101100010111000000100101101101000011010010110001001101100111000000100101101101001011000110110110101101001"
  "01100111011011100110010100001100101010100110011011101010011001110110000001001100111011101110100001100111011011001110000001001100111011101110100101101011011010110110100101100111011011100110010100001100101010010110000111100000010011100110101001101010011011001110101001100000010000110110100001101001111010010110011101101110011001010000011000101001011001101110101001100000010011100110111101100011011000100110000001000100111010010110011101101110011011001110010100000110001011110110101011100100111000000100110001101111011000110110001101101001111000000100010001101001011001001110001001101100111001010000001010100001011001001110101001101010011000000100011001100100111010100110011101101100011000010110000001000001011010100110011101101100111001010000001010101110111011110110000001000010111010101110010011100010111000110110101001100000010000100110111101100110111010100110110011100000010010000110011101100010011001010000100000100000010000001110100001100100111000101110010011101001011000100110111001101010011000000100100101100111011000"
  "00010010000110000001000000111010100110100001100100111000000100001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010000101110101001100111011000101110000101100000010000100110100001101001111000000100111101100110011000000100110001100001011001001110100101101100111000101110101101101000011011001110000001001011011010011110000001000010111001001110101011101010011000000100001101101111011001101110101001100000010011001110101001100111011000101110000001000010111011110110000001001011011010100110010100000010101010100110011101100000010000001110100101100000111010100110010011101100111000000100000011101001011000001110100101100111011011100110010100000111001010010110011101101010011000000100001001100100111010101110101101101011011010100110010011101100111000000100001001100100111010101110101101101011011010010110011101101110011001010000101000101001011011100110000101100010111000000100101101101000011010010110001001101100111000000100101101101001011000110110110101101001011001110110"
  "11100110010100001100101010100110011011101010011001110110000001001100111011101110100001100111011011001110000001001100111011101110100101101011011010110110100101100111011011100110010100001100101010010110000111100000010011100110101001101010011011001110101001100000010000110110100001101001111010010110011101101110011001010000011000101001011001101110101001100000010011100110111101100011011000100110000001000100111010010110011101101110011011001110010100000110001011110110101011100100111000000100110001101111011000110110001101101001111000000100010001101001011001001110001001101100111001010000001010100001011001001110101001101010011000000100011001100100111010100110011101101100011000010110000001000001011010100110011101101100111001010000001010101110111011110110000001000010111010101110010011100010111000110110101001100000010000100110111101100110111010100110110011100000010010000110011101100010011001010000100000100000010000001110100001100100111000101110010011101001011000100110111001101010011000000100100101100111011000000100100001"
  "10000001000000111010100110100001100100111000000100001011100100111010100110101001100111010001010000010100001111001001110110000001000010111000010110101001100000010010100110001101101010011001101110101001100111011000101110000101100000010000100110100001101001111000000100111101100110011000000100110001100001011001001110100101101100111000101110101101101000011011001110000001001011011010011110000001000010111001001110101011101010011000000100001101101111011001101110101001100000010011001110101001100111011000101110000001000010111011110110000001001011011010100110010100001010001000110110101001100110111010100110011101100000010000110110100001100010011010010110101001101100111000000100001001101000011001110110110001101001011001110110111001100101000000101010101001100111011000000100000011101001011000001110101001100100111011001110000001000000111010010110000011101001011001110110111001100101000001110010100101100111011010100110000001000010011001001110101011101011011010110110101001100100111011001110000001000010011001001110101011101011"
  "01101011011010010110011101101110011001010000101000101001011011100110000101100010111000000100101101101000011010010110001001101100111000000100101101101001011000110110110101101001011001110110111001101110011001010000110010101001011000011110000001001110011010100110101001101100111010100110000001000011011010000110100111101001011001110110111001100101000001100010100101100110111010100110000001001110011011110110001101100010011000000100010011101001011001110110111001101100111001010000011000101111011010101110010011100000010011000110111101100011011000110110100111100000010001000110100101100100111000100110110011100101000000101010000101100100111010100110101001100000010001100110010011101010011001110110110001100001011000000100000101101010011001110110110011100101000000101010111011101111011000000100001011101010111001001110001011100011011010100110000001000010011011110110011011101010011011001110000001001000011001110110001001100101000010000010000001000000111010000110010011100010111001001110100101100010011011100110101001100000010010"
  "01011001110110000001001000011000000100000011101010011010000110010011100000010000101110010011101010011010100110011101000101000001010000111100100111011000000100001011100001011010100110000001000010111011101110101001100011011000101110000101100000010000100110100001101001111000000100111101100110011000000100110001100001011001001110100101101100111000101110101101101000011011001110000001001011011010011110000001000010111001001110101011101010011000000100001101101111011001101110101001100000010011001110101001100111011000101110000001000010111011110110000001001011011010100110010100000010101011101110101001100011011001101110101001100000010000110110111101100100111000100110110011100000010000110110101001101000011000001110100101100111011011100110010100001010001000110110101001100110111010100110011101100000010000110110100001100010011010010110101001101100111000000100001001101000011001110110110001101001011001110110111001100101000000101010101001100111011000000100000011101001011000001110101001100100111011001110000001000000111010010110"
  "00001110100101100111011011100110010100000111001010010110011101101010011000000100001001100100111010101110101101101011011010100110010011101100111000000100001001100100111010101110101101101011011010010110011101101110011001010000101000101001011011100110000101100010111000000100101101101000011010010110001001101100111000000100101101101001011000110110110101101001011001110110111001100101000011001010101001100110111010100110011101100000010011001110111011101000011001110110110011100000010011001110111011101001011010110110101101101001011001110110111001100101000011001010100101100001111000000100111001101010011010100110110011101010011000000100001101101000011010011110100101100111011011100110010100000110001010010110011011101010011000000100111001101111011000110110001001100000010001001110100101100111011011100110110011100101000001100010111101101010111001001110000001001100011011110110001101100011011010011110000001000100011010010110010011100010011011001110010100000010101000010110010011101010011010100110000001000110011001001110101001"
  "100111011011000110000101100000010000010110101001100111011011001110010100000010101011101110111101100000010000101110101011100100111000101110001101101010011000000100001001101111011001101110101001101100111000000100100001100111011000100110010100001000001000000100000011101000011001001110001011100100111010010110001001101110011010100110000001001001011001110110000001001000011000000100000011101010011010000110010011100000010000101110010011101010011010100110011101000101000001010000";
 
  while(c < d.size())
        {
                e = 0;
                for(b = 0; b < 8; ++b)
                        {
                                if(d[c++] == '1')
                                        e += pow(2.0, b);
                        }
                        //a = e;
                        cout << e;
        }
        return 0;
}

---

as i could not understand why he was assigning e to a and not just output e, when i ran the the program the output consisted of digits and not text as had been before and even after changing the code back to original the same effect happenned, tried every version of compiling, even closing dot net down and restarting still produced the same effect of just digits, i must be missing soemthing obviously

Luigi

ps..sorry for the widescreen effect bit i dont know how to change that and still have the code section work

Aye...don't even look at the second piece of code. It won't help you.

First, get a text copy of the 12 days of Christmas. Consider writing one full verse to the screen on every loop. Figure out which parts of the song need to written on every pass.

Personally, I think this is easier in C++ due to the fall-through nature of switch statements.

thank you pianorain

as soon as i saw the carol i could see the pattern of text. and voila!

Code:

---

for(int loop=0; loop<stringArray.Length; loop++)
                {
                        Console.WriteLine(stringArray[loop]);

                        if (stringArray[loop].EndsWith("Tree"))
                        {
                                Console.WriteLine();
                                Console.WriteLine();
                        }
                }

---

not posting the array as it goes on for miles by the 12th paragraph.

By the way as i am working through the Deitel C# How to Program (as im sure your aware of) to keep active on the programming front so as i dont forget what i learnt on my degree while i look for work.

I am accumilating all the exercises; i have generated solutions (with this boards help ) from ch4 to ch6 inclusive, so if anyone wants them please ask or email me. They may not be the best solutions in the world but they work.

luigi :)

and im happy because i have completed chapter 6

cheers people

That's one way to do it. However, you can shorten the amount of string literals in your code by using another loop. If you simply made an array with each verse as an element, then you wrote the whole song in a literal. The object of this exercise is to find what elements are common to each loop iteration and factor them out. Consider using two different loops.

I'll give you a hint. When I posted the first time, I was thinking of a different kind of solution in C++. After writing out both solutions, I think the two-loop solution is easier to understand than the fall-through-cases solution. Since C# does not have implicit fall-through cases, you have to use some ugly code to replicate this kind of behavior. However, you should be able to take parts of this code (using no more literals than I have), change the switch statement into a loop structure, and do the same thing.

Code:

---

#include<iostream>
#include<string>

using namespace std;

const string lines[] =
        {       
                "a Partridge in a Pear Tree.",
                "Two Turtle Doves and ",
                "Three French Hens, ",
                "Four Calling Birds, ",
                "Five Golden Rings, ",
                "Six Geese a Laying, ",
                "Seven Swans a Swimming, ",
                "Eight Maids a Milking, ",
                "Nine Ladies Dancing, ",
                "Ten Lords a Leaping, ",
                "Eleven Pipers Piping, ",
                "Twelve Drummers Drumming, "
        };

const string numbers[] =
        {
                "first",
                "second",
                "third",
                "fourth",
                "fifth",
                "sixth",
                "seventh",
                "eighth",
                "ninth",
                "tenth",
                "eleventh",
                "twelfth"
        };

void Display12Days()
{
        for(int i = 0; i < 12; i++)
        {
                cout << "On the " << numbers[i] <<
                        " day of Christmas\nmy true love gave to me:" << endl;
                switch(i)
                {
                case 11: cout << lines[11] << endl;
                case 10: cout << lines[10] << endl;
                case 9: cout << lines[9] << endl;
                case 8: cout << lines[8] << endl;
                case 7: cout << lines[7] << endl;
                case 6: cout << lines[6] << endl;
                case 5: cout << lines[5] << endl;
                case 4: cout << lines[4] << endl;
                case 3: cout << lines[3] << endl;
                case 2: cout << lines[2] << endl;
                case 1: cout << lines[1] << endl;
                case 0: cout << lines[0] << endl;
                }
                cout << endl;
        }
}

---

yes you are right and with some logical thinking and a bit of paper here is the second version using less string literals

Code:

---

using System;

namespace Ex6_17._2
{
       
        class Class1
        {
                static string[] lines = {"a Partridge in a Pear Tree.",
                                                        "Two Turtle Doves and ",
                                                        "Three French Hens, ",
                                                        "Four Calling Birds, ",
                                                        "Five Golden Rings, ",
                                                        "Six Geese a Laying, ",
                                                        "Seven Swans a Swimming, ",
                                                        "Eight Maids a Milking, ",
                                                        "Nine Ladies Dancing, ",
                                                        "Ten Lords a Leaping, ",
                                                        "Eleven Pipers Piping, ",
                                                        "Twelve Drummers Drumming, "
                                                };

                static string[] numbers = {"first", "second", "third",
                                                          "fourth", "fifth", "sixth",
                                                          "seventh", "eighth", "ninth",
                                                          "tenth", "eleventh", "twelfth"
                                                  };

                static void Main(string[] args)
                {
                        Display12Days();
                }

                static void Display12Days()
                {
                        for(int outer = 0; outer < 12; outer++)
                        {
                                Console.WriteLine("On the " + numbers[outer] +
                                        " day of Christmas\nmy true love gave to me:");
                               
                                for(int inner = outer; inner>=0; inner--)
                                        Console.WriteLine(lines[inner]);
                               
                                Console.WriteLine();
                        }
                }

        }
}

---

thanks again for the help

didnt use const as i read this on MSDN

Quote:

---

A string is a sequential collection of Unicode characters, typically used to represent text, while a String is a sequential collection of System.Char objects that represents a string. The value of the String is the content of the sequential collection, and the value is immutable.

---

but hey i could be wrong lol

Well, you can't declare the arrays as const (for reasons that I don't totally understand). You can declare the arrays as readonly, which keeps you from accidently modifying the arrays.

The only thing I did differently in my C# version was to declare the verse text as a const string and use string.Format to insert the number text.

Code:

---

const string verse = "On the {0} day of Christmas,\nmy true love gave to me:";

static void Display12Days()
{
        for (int outer = 0; outer < 12; outer++)
        {
                Console.WriteLine(string.Format(verse, numbers[outer]));
                for (int inner = outer; inner >= 0; inner--)
                        Console.WriteLine(lines[inner]);
               
                Console.WriteLine();
        }
}

---

That keeps all the strings out of your code block. That's just a minor thing, though.

Code:

---

const string verse = "On the {0} day of Christmas\nmy true love gave to me:";

---

worked ok in my 2003 dot net ide version