Fondamentaux du séquençage de fichier

Introduction

le séquençage d'un fichier consiste à effectuer une des opérations courantes sur le fichier, tel que le créer ou l'ouvrir. Cette opération de base peut être effectuée en utilisant une classe appelée FileStream. Vous pouvez utiliser un objet FileStream pour obtenir un stream prêt pour le traitement. En tant qu'une des classes les plus complètes du traitement de fichier du .NET Framework, FileStream est équipé de toutes les propriétés et méthodes nécessaires. Pour l'utiliser, vous devez d'abord déclarer sa variable. La classe est équipée de neuf constructeurs.

Un des constructeurs (le second) de la classe FileStream a la syntaxe suivante :

public FileStream(string path, FileMode mode);

Ce constructeur prend comme premier argument le nom du fichier ou son chemin. Le deuxième argument indique le type d'opération à exécuter sur le fichier. Voici un exemple :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";

	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	return 0;
    }
}

1. Pour créer un nouveau stream, changez la méthode SaveOrder() dans le fichier IceScream.cs comme suit :
    

   using System; using System.IO; namespace IceCream3 { . . . No Change public void SaveOrder() { string NameOfFile; Console.Write("Please enter your initials or the " + "name we will use to remember your order: "); NameOfFile = Console.ReadLine(); if( File.Exists(NameOfFile) ) { char Answer; Console.WriteLine("The file you entered exists already."); Console.Write("Do you want to replace it(y/n)?" ); Answer = char.Parse(Console.ReadLine()); FileStream stmIceScream = new FileStream(NameOfFile, FileMode.Create); if( Answer == 'y' || Answer == 'Y' ) Console.WriteLine("The former order with the " + "same name will be replaced"); else if( Answer == 'n' || Answer == 'N' ) { Console.WriteLine("Please enter a name we will " + "use to remember this order: "); NameOfFile = Console.ReadLine(); } else Console.WriteLine("Invalid Answer - We will close"); return; } else Console.WriteLine("Great"); } public void OpenOrder() { . . . No Change } } }

2. sauvegardez le fichier

Une opération de séquençage est typiquement utilisée pour créer un stream. Une fois que le stream est prêt, vous pouvez en écrire des données. L'opération d'écriture est exécutée par diverses classes. Une de ces classes est BinaryWriter.

La classe BinaryWriter peut être utilisée pour écrire des valeurs des types de données primitifs (char, int, float, double, etc.). Pour utiliser une valeur BinaryWriter, vous pouvez d'abord déclarer sa variable. Pour ce faire, vous utiliserez un des trois constructeurs des classes. Un de ses constructeurs (le second) a la syntaxe suivante :

public BinaryWriter(Stream output);

Ce constructeur prend comme argument une valeur Stream, qui pourrait être une variable de FileStream. Voici un exemple :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";

	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	BinaryWriter wrtPersons = new BinaryWriter(fstPersons);

	return 0;
    }
}

La plupart des classes qui sont utilisées pour ajouter des valeurs Stream sont équipées d'une méthode appelée Write. C'est aussi le cas pour la classe BinaryWriter. Cette méthode prend comme argument la valeur qui doit être écrite au Stream. La méthode est prise en charge de sorte qu'il y ait une version pour chaque type de données primitif. Voici un exemple qui ajoute des chaînes de caractères à un fichier de création récente :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";

	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	BinaryWriter wrtPersons = new BinaryWriter(fstPersons);

	wrtPersons.Write("James Bloch");
	wrtPersons.Write("Catherina Wallace");
	wrtPersons.Write("Bruce Lamont");
	wrtPersons.Write("Douglas Truth");

	return 0;
    }
}

Quand vous utilisez un stream, il demande des ressources du logiciel d'exploitation et les utilise tandis que le stream est disponible. Quand vous n'utiliserez plus le stream, vous devriez libérer les ressources et les rendre encore disponibles au logiciel d'exploitation de sorte que d'autres services puissent les utiliser. Ceci est fait par la fermeture du stream.

Pour fermer un stream, vous pouvez faire appel à la méthode Close() de la classe ou des classes que vous utilisée(s). Voici les exemples :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";

	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	BinaryWriter wrtPersons = new BinaryWriter(fstPersons);

	wrtPersons.Write("James Bloch");
	wrtPersons.Write("Catherina Wallace");
	wrtPersons.Write("Bruce Lamont");
	wrtPersons.Write("Douglas Truth");
		
	wrtPersons.Close();
	fstPersons.Close();

	return 0;
    }
}

1. Pour pouvoir compléter un fichier, changez la méthode SaveOrder () dans le fichier IceScream.cs comme suit :
    

   using System; using System.IO; namespace IceCream3 { . . . No Change public void SaveOrder() { string strNameOfFile; Console.Write("Please enter your initials or the name " + "we will use to remember your order: "); strNameOfFile = Console.ReadLine(); strNameOfFile = strNameOfFile + ".icr"; // Find out if the user entered a name of a file // that is already in the machine if (File.Exists(strNameOfFile)) { char answer; FileStream stmIceScream = new FileStream(strNameOfFile, FileMode.Create); BinaryWriter bnwIceScream = new BinaryWriter(stmIceScream); // If so, find out if the user wants to // replace the old file Console.WriteLine("The file you entered exists already."); Console.Write("Do you want to replace it(y/n)?"); answer = char.Parse(Console.ReadLine()); // If the customer wants to replace it... if (answer == 'y' || answer == 'Y') { // ... do so Console.WriteLine("The former order with the same " + "name will be replaced"); Console.WriteLine( "\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); } // If the customer wants to save the new order with // a different name else if (answer == 'n' || answer == 'N') { // Ask the user to enter a name to remember the order Console.Write("Please enter a name we will use " + "to remember this order: "); strNameOfFile = Console.ReadLine(); strNameOfFile = strNameOfFile + ".icr"; stmIceScream = new FileStream(strNameOfFile, FileMode.Create); bnwIceScream = new BinaryWriter(stmIceScream); Console.WriteLine( "\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); } else Console.WriteLine("Invalid Answer - We will close"); bnwIceScream.Close(); stmIceScream.Close(); } else { FileStream stmIceScream = new FileStream(strNameOfFile, FileMode.Create); BinaryWriter bnwIceScream = new BinaryWriter(stmIceScream); Console.WriteLine("\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); bnwIceScream.Close(); stmIceScream.Close(); } } public void OpenOrder() { . . . No Change } } }

2. Exécutez l'application et l'examiner. Voici un exemple :
    

   =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Vending Machine ----------------------------------- What type of flavor do you want? 1 - Vanilla 2 - Cream of Cocoa 3 - Chocolate Chip 4 - Organic Strawberry 5 - Butter Pecan 6 - Cherry Coke 7 - Chocolate Brownies 8 - Caramel Au Lait 9 - Chunky Butter 10 - Chocolate Cookie Your Choice? 8 ----------------------------------- What type of container do you want? 1 - Cone 2 - Cup 3 - Bowl Your Choice? 2 ----------------------------------- Do you want an ingredient or not 1 - No Ingredient 2 - Peanuts 3 - M & M 4 - Cookies Your Choice? 3 ----------------------------------- How many scoops(1, 2, or 3)? 2 ----------------------------------- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Order ----------------------------------- Flavor: Caramel Au Lait Container: Cup Ingredient: M & M Scoops: 2 Total Price: $3.10 =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Do you want us to remember this order the next time you come to get your ice scream (y/n)? Y Please enter your initials or the name we will use to remember your order: LS =-= Ice Scream Vending Machine =-= Saving Order: LS.icr Press any key to continue . . .

3. Fermer la fenêtre de DOS

Par opposition à l'inscription dans un stream, vous pouvez vouloir en lire des données existantes. Avant de faire ceci, vous pouvez d'abord indiquer votre intention à la classe stream en  utilisant l'agent recenseur FileMode. Ceci peut être fait en utilisant la classe FileStream comme suit :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";
/*
	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	BinaryWriter wrtPersons = new BinaryWriter(fstPersons);

	wrtPersons.Write("James Bloch");
	wrtPersons.Write("Catherina Wallace");
	wrtPersons.Write("Bruce Lamont");
	wrtPersons.Write("Douglas Truth");
		
	wrtPersons.Close();
	fstPersons.Close();
*/
	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Open);

	return 0;
    }
}

Une fois que le stream est prêt, vous pouvez vous préparer à lire ses données. Pour soutenir ceci, vous pouvez utiliser la classe BinaryReader. Cette classe fournit deux constructeurs. Un des constructeurs (le premier) a la syntaxe suivante :

public BinaryReader(Stream input);

Ce constructeur prend comme argument une valeur Stream, qui pourrait être un objet de FileStream. Après la déclaration d'une variable FileStream en utilisant ce constructeur, vous pouvez lire ses données. Pour ce faire, vous pouvez appeler une méthode appropriée. Cette classe fournit une méthode appropriée pour chaque type de données primitif.

Après avoir utiliser le stream, vous devriez le fermer pour reprendre les ressources qu'il utilisait. Ceci est fait en appelant la méthode Close()  .

Voici un exemple d'utilisation des méthodes mentionnées :

using System;
using System.IO;

class Exercise
{
    static int Main()
    {
	string NameOfFile = "Persons.spr";
/*
	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Create);
	BinaryWriter wrtPersons = new BinaryWriter(fstPersons);

	wrtPersons.Write("James Bloch");
	wrtPersons.Write("Catherina Wallace");
	wrtPersons.Write("Bruce Lamont");
	wrtPersons.Write("Douglas Truth");
		
	wrtPersons.Close();
	fstPersons.Close();
*/
	FileStream fstPersons = new FileStream(NameOfFile, FileMode.Open);
	BinaryReader rdrPersons = new BinaryReader(fstPersons);
	string strLine = null;

	strLine = rdrPersons.ReadString();
	Console.WriteLine(strLine);
	strLine = rdrPersons.ReadString();
	Console.WriteLine(strLine);
	strLine = rdrPersons.ReadString();
	Console.WriteLine(strLine);
	strLine = rdrPersons.ReadString();
	Console.WriteLine(strLine);

	rdrPersons.Close();
	fstPersons.Close();

	return 0;
    }
}

1. Pour pouvoir rechercher les données à partir d'un fichier existant, changez le fichier IceCream.cs comme suit :
    

   using System; using System.IO; namespace IceCream3 { delegate void Request(); // This class is used to create and manage an ice scream // and to process an order public sealed class IceScream { // This is the base price of an ice scream // Optional values may be added to it public const decimal BasePrice = 1.55M; // These arrays are used to build the components // of various ice screams // In C#, we can allocate an array's memory in // the body of the class private string[] Flavor; private string[] Container; private string[] Ingredient; // Additional factor used to process an ice scream order private int Scoops; private decimal TotalPrice; // Variables that will hold the user's choice // These are declared "globally" so they can be // shared among methods int ChoiceFlavor; int ChoiceContainer; int ChoiceIngredient; // This default constructor is the best place for // us to initialize the array public IceScream() { Flavor = new string[10]; Flavor[0] = "Vanilla"; Flavor[1] = "Cream of Cocoa"; Flavor[2] = "Chocolate Chip"; Flavor[3] = "Organic Strawberry"; Flavor[4] = "Butter Pecan"; Flavor[5] = "Cherry Coke"; Flavor[6] = "Chocolate Brownies"; Flavor[7] = "Caramel Au Lait"; Flavor[8] = "Chunky Butter"; Flavor[9] = "Chocolate Cookie"; Ingredient = new string[4]; Ingredient[0] = "No Ingredient"; Ingredient[1] = "Peanuts"; Ingredient[2] = "M & M"; Ingredient[3] = "Cookies"; Container = new string[3]; Container[0] = "Cone"; Container[1] = "Cup"; Container[2] = "Bowl"; } // This method requests a flavor from the user and // returns the choice public void ChooseFlavor() { // Make sure the user selects a valid number //that represents a flavor... do { // In case the user types a symbol that // is not a number try { Console.WriteLine("What type of flavor do you want?"); for (int i = 0; i < Flavor.Length; i++) Console.WriteLine("{0} - {1}", i + 1, Flavor[i]); Console.Write("Your Choice? "); ChoiceFlavor = int.Parse(Console.ReadLine()); } catch (FormatException) // display an appropriate message { Console.WriteLine("You must enter a valid number " + "and no other character!"); } // If the user typed an invalid number out of the // allowed range // let him or her know and provide another chance if (ChoiceFlavor < 1 || ChoiceFlavor > Flavor.Length) Console.WriteLine("Invalid Choice - Try Again!\n"); } while (ChoiceFlavor < 1 || ChoiceFlavor > Flavor.Length); } // This method allows the user to select a container public void ChooseContainer() { // Make sure the user selects a valid number that // represents a container do { // If the user types a symbol that is not a number try { Console.WriteLine("What type of container do you want?"); for (int i = 0; i < Container.Length; i++) Console.WriteLine("{0} - {1}", i + 1, Container[i]); Console.Write("Your Choice? "); ChoiceContainer = int.Parse(Console.ReadLine()); } catch (FormatException) // display an appropriate message { Console.WriteLine("You must enter a valid " + "number and no other character!"); } // If the user typed an invalid number out of the // allowed range // let him or her know and provide another chance if ((ChoiceContainer < 1) || (ChoiceContainer > Container.Length)) Console.WriteLine("Invalid Choice - Try Again!"); } while ((ChoiceContainer < 1) || (ChoiceContainer > Container.Length)); } public void ChooseIngredient() { do { try { Console.WriteLine("Do you want an ingredient or not"); for (int i = 0; i < Ingredient.Length; i++) Console.WriteLine("{0} - {1}", i + 1, Ingredient[i]); Console.Write("Your Choice? "); ChoiceIngredient = int.Parse(Console.ReadLine()); } catch (FormatException) { Console.WriteLine("You must enter a valid " + "number and no other character!"); } if ((ChoiceIngredient < 1) || (ChoiceIngredient > Ingredient.Length)) Console.WriteLine("Invalid Choice - Try Again!"); } while ((ChoiceIngredient < 1) || (ChoiceIngredient > Ingredient.Length)); } public void SpecifyNumberOfScoops() { do { try { Console.Write("How many scoops(1, 2, or 3)? "); Scoops = int.Parse(Console.ReadLine()); } catch (FormatException) { Console.WriteLine("You must enter a valid number " + "and no other character!"); } if (Scoops < 1 || Scoops > 3) Console.WriteLine("Invalid Choice - Try Again!"); } while (Scoops < 1 || Scoops > 3); } // This method is used to process a customer order // It uses the values of the above methods public void ProcessAnOrder() { // int ChoiceFlavor; // int ChoiceContainer; // int ChoiceIngredient; decimal PriceIngredient, PriceScoop; // Let the user know that this is a vending machine Console.WriteLine("=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*="); Console.WriteLine("Ice Scream Vending Machine"); Console.WriteLine("-----------------------------------"); // Let the user select the components of the ice scream Request Get = new Request(ChooseFlavor); Get(); Console.WriteLine("-----------------------------------"); Get = new Request(ChooseContainer); Get(); Console.WriteLine("-----------------------------------"); Get = new Request(ChooseIngredient); Get(); Console.WriteLine("-----------------------------------"); Get = new Request(SpecifyNumberOfScoops); Get(); Console.WriteLine("-----------------------------------"); // If the user selects an ingredient instead of "No Ingredient", // add $0.50 to the order if ((ChoiceIngredient == 2) || (ChoiceIngredient == 3) || (ChoiceIngredient == 4)) PriceIngredient = 0.50M; else PriceIngredient = 0.00M; // Instead of multiplying a number scoops to a value, // We will use an incremental value depending on // the number of scoops if (Scoops == 1) PriceScoop = 0.65M; else if (Scoops == 2) PriceScoop = 1.05M; else PriceScoop = 1.55M; // Calculate the total price of the ice scream TotalPrice = BasePrice + PriceScoop + PriceIngredient; // Create the ice scream... // And display a receipt to the user DisplayReceipt(); } // This method is used to display a receipt to the user public void DisplayReceipt() { Console.WriteLine("\n=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*="); Console.WriteLine("Ice Scream Order"); Console.WriteLine("-----------------------------------"); Console.WriteLine("Flavor: {0}", Flavor[ChoiceFlavor - 1]); Console.WriteLine("Container: {0}", Container[ChoiceContainer - 1]); Console.WriteLine("Ingredient: {0}", Ingredient[ChoiceIngredient - 1]); Console.WriteLine("Scoops: {0}", Scoops); Console.WriteLine("Total Price: {0:C}", TotalPrice); Console.WriteLine("=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=\n"); } public void SaveOrder() { string strNameOfFile; Console.Write("Please enter your initials or the name " + "we will use to remember your order: "); strNameOfFile = Console.ReadLine(); strNameOfFile = strNameOfFile + ".icr"; // Find out if the user entered a name of a file // that is already in the machine if (File.Exists(strNameOfFile)) { char answer; FileStream stmIceScream = new FileStream(strNameOfFile, FileMode.Create); BinaryWriter bnwIceScream = new BinaryWriter(stmIceScream); // If so, find out if the user wants to // replace the old file Console.WriteLine("The file you entered exists already."); Console.Write("Do you want to replace it(y/n)?"); answer = char.Parse(Console.ReadLine()); // If the customer wants to replace it... if (answer == 'y' || answer == 'Y') { // ... do so Console.WriteLine("The former order with the same " + "name will be replaced"); Console.WriteLine( "\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); } // If the customer wants to save the new order with // a different name else if (answer == 'n' || answer == 'N') { // Ask the user to enter a name to remember the order Console.Write("Please enter a name we will use " + "to remember this order: "); strNameOfFile = Console.ReadLine(); strNameOfFile = strNameOfFile + ".icr"; stmIceScream = new FileStream(strNameOfFile, FileMode.Create); bnwIceScream = new BinaryWriter(stmIceScream); Console.WriteLine( "\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); } else Console.WriteLine("Invalid Answer - We will close"); bnwIceScream.Close(); stmIceScream.Close(); } else { FileStream stmIceScream = new FileStream(strNameOfFile, FileMode.Create); BinaryWriter bnwIceScream = new BinaryWriter(stmIceScream); Console.WriteLine("\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Saving Order: {0}", strNameOfFile); bnwIceScream.Write(Flavor[ChoiceFlavor - 1]); bnwIceScream.Write(Container[ChoiceContainer - 1]); bnwIceScream.Write(Ingredient[ChoiceIngredient - 1]); bnwIceScream.Write(Scoops); bnwIceScream.Write(TotalPrice); bnwIceScream.Close(); stmIceScream.Close(); } } public void OpenOrder() { string strNameOfFile; string SelectedFlavor; string SelectedContainer; string SelectedIngredient; // Ask the user to enter a name of a previously saved order Console.Write("Please enter the name you previously " + "gave to remember your order: "); strNameOfFile = Console.ReadLine(); strNameOfFile = strNameOfFile + ".icr"; FileStream stmIceScream = new FileStream(strNameOfFile, FileMode.Open); BinaryReader bnrIceScream = new BinaryReader(stmIceScream); // Find out if this order was previously saved in the machine if (File.Exists(strNameOfFile)) { // If so, open it SelectedFlavor = bnrIceScream.ReadString(); SelectedContainer = bnrIceScream.ReadString(); SelectedIngredient = bnrIceScream.ReadString(); Scoops = bnrIceScream.ReadInt32(); TotalPrice = bnrIceScream.ReadDecimal(); // And display it to the user Console.WriteLine("\n=-= Ice Scream Vending Machine =-="); Console.WriteLine(" Previous Order: {0}", strNameOfFile); Console.WriteLine("Flavor: {0}", SelectedFlavor); Console.WriteLine("Container: {0}", SelectedContainer); Console.WriteLine("Ingredient: {0}", SelectedIngredient); Console.WriteLine("Scoops: {0}", Scoops); Console.WriteLine("Total Price: {0:C}\n", TotalPrice); bnrIceScream.Close(); stmIceScream.Close(); } else Console.WriteLine("The name you entered is not " + "registered in our previous orders"); } } }

2. Accédez au fichier Program.cs et changez le comme suit :
    

   using System; namespace IceCream3 { class Program { static int Main(string[] args) { char answer = 'n'; IceScream ic = new IceScream(); Request process = new Request(ic.ProcessAnOrder); Console.Write("Do you want to re-order a previously " + "saved order(y/n)? "); answer = char.Parse(Console.ReadLine()); if (answer == 'y' || answer == 'Y') ic.OpenOrder(); else { process(); Console.Write("Do you want us to remember this " + "order the next time you come to " + "get your ice scream (y/n)? "); answer = char.Parse(Console.ReadLine()); if (answer == 'y' || answer == 'Y') ic.SaveOrder(); else Console.WriteLine("\nIt was nice serving you." + "\nCome Again!!!\n"); } return 0; } } }

3. Exécutez l'application et l'examiner. Voici un exemple :
    

   Do you want to re-order a previously saved order(y/n)? Y Please enter the name you previously gave to remember your order: LS =-= Ice Scream Vending Machine =-= Previous Order: LS.icr Flavor: Caramel Au Lait Container: Cup Ingredient: M & M Scoops: 2 Total Price: $3.10 Press any key to continue . . .

4. Fermez la fenêtre DOS
5. Exécutez encore l'application et l'examiner. Voici un exemple :
    

   Do you want to re-order a previously saved order(y/n)? w =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Vending Machine ----------------------------------- What type of flavor do you want? 1 - Vanilla 2 - Cream of Cocoa 3 - Chocolate Chip 4 - Organic Strawberry 5 - Butter Pecan 6 - Cherry Coke 7 - Chocolate Brownies 8 - Caramel Au Lait 9 - Chunky Butter 10 - Chocolate Cookie Your Choice? 5 ----------------------------------- What type of container do you want? 1 - Cone 2 - Cup 3 - Bowl Your Choice? 2 ----------------------------------- Do you want an ingredient or not 1 - No Ingredient 2 - Peanuts 3 - M & M 4 - Cookies Your Choice? 1 ----------------------------------- How many scoops(1, 2, or 3)? 1 ----------------------------------- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Order ----------------------------------- Flavor: Butter Pecan Container: Cup Ingredient: No Ingredient Scoops: 1 Total Price: $2.20 =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Do you want us to remember this order the next time you come to get your ice scream (y/n)? y Please enter your initials or the name we will use to remember your order: DIC =-= Ice Scream Vending Machine =-= Saving Order: DIC.icr Press any key to continue . . .

6. Fermez la fenêtre DOS
7. Exécutez encore l'application et l'examiner. Voici un exemple :
    

   Do you want to re-order a previously saved order(y/n)? n =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Vending Machine ----------------------------------- What type of flavor do you want? 1 - Vanilla 2 - Cream of Cocoa 3 - Chocolate Chip 4 - Organic Strawberry 5 - Butter Pecan 6 - Cherry Coke 7 - Chocolate Brownies 8 - Caramel Au Lait 9 - Chunky Butter 10 - Chocolate Cookie Your Choice? 9 ----------------------------------- What type of container do you want? 1 - Cone 2 - Cup 3 - Bowl Your Choice? 3 ----------------------------------- Do you want an ingredient or not 1 - No Ingredient 2 - Peanuts 3 - M & M 4 - Cookies Your Choice? 4 ----------------------------------- How many scoops(1, 2, or 3)? 3 ----------------------------------- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Ice Scream Order ----------------------------------- Flavor: Chunky Butter Container: Bowl Ingredient: Cookies Scoops: 3 Total Price: $3.60 =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Do you want us to remember this order the next time you come to get your ice scream (y/n)? Y Please enter your initials or the name we will use to remember your order: LS The file you entered exists already. Do you want to replace it(y/n)?Y The former order with the same name will be replaced =-= Ice Scream Vending Machine =-= Saving Order: LS.icr Press any key to continue . . .

8. Fermez la fenêtre DOS