. NET Study notes----2015-06-30 (supermarket cashier system 02)

Hit the course with the code: actually there are a lot of pits, and then study

Supermarket Category:

    classSuppermarket {//Create a Warehouse objectCangku ck =NewCangku ();  PublicSuppermarket () {ck. Jinpros ("Acer", +); Ck. Jinpros ("SamSung", +); Ck. Jinpros ("jiangyou", +); Ck. Jinpros ("Banana", +); }        /// <summary>        ///the process of interacting with the user/// </summary>         Public voidaskbuying () {Console.WriteLine ("Welcome, may I ask what you need? "); Console.WriteLine ("we have Acer, SamSung, jiangyou, Banana"); stringStrtype =Console.ReadLine (); Console.WriteLine ("How much do you need? "); intCount =Convert.ToInt32 (Console.ReadLine ()); //go to the warehouse to collect goodsProductfather[] Pros =ck.            Qupros (Strtype, Count); //Calculate the price            DoubleRealmoney =Getmoney (Pros); Console.WriteLine ("you are dealing with {0} dollars in total", Realmoney); Console.WriteLine ("Please select the discount method 2--dozen 90 percent 3--dozen 85 percent 4--buy 300 get 50 5--buy 500 send"); stringinput =Console.ReadLine (); //get a discounted object based on the user's input through a simple factory design patternCalfather cal =getcal (input); DoubleTotalmoney =Cal.            Gettotalmoney (Realmoney); Console.WriteLine ("you deal with {0} dollars after you finish the break", Totalmoney); Console.WriteLine ("Here is your shopping list"); foreach(varIteminchpros) {Console.WriteLine ("name of goods:"+ Item. Name +","+"\ t"+"Price of Goods:"+ Item. Price +","+"\ t"+"Cargo Code:"+item.id); }        }                       /// <summary>        ///returns a discounted object based on a user-selected discount method/// </summary>        /// <param name= "Input" >User's Choice</param>        /// <returns>returned parent class object But it contains a subclass object.</returns>         PublicCalfather getcal (stringinput) {Calfather cal=NULL; Switch(input) { Case "1": Cal =NewCalnormal ();  Break;  Case "2": Cal =NewCalrate (0.9);  Break;  Case "3": Cal =NewCalrate (0.85);  Break;  Case "4": Cal =NewCALMN ( -, -);  Break;  Case "5": Cal =NewCALMN ( -, -);  Break; }            returnCal; }        /// <summary>        ///calculate the total price according to the goods purchased by the user/// </summary>        /// <param name= "Pros" ></param>        /// <returns></returns>         Public DoubleGetmoney (productfather[] pros) {DoubleRealmoney =0;  for(inti =0; I < Pros. Length; i++) {Realmoney+=Pros[i].            Price; }            returnRealmoney; }         Public voidShwopros () {ck.        Showpros (); }    }

The parent class of the discounted class: abstract class

    /// <summary>    ///Discounted Parent Class/// </summary>    Abstract classCalfather {/// <summary>        ///calculate how much money to deal with after discounting/// </summary>        /// <param name= "Realmoney" >the price payable before the discount</param>        /// <returns>money to deal with after discounting</returns>         Public Abstract DoubleGettotalmoney (DoubleRealmoney); }

No discount:

    classCalnormal:calfather {/// <summary>        ///No discount/// </summary>        /// <param name= "Realmoney" ></param>        /// <returns></returns>         Public Override DoubleGettotalmoney (DoubleRealmoney) {            returnRealmoney; }    }

Discount: Algorithm for discount

    /// <summary>    ///rate discount, discounted at discount rate/// </summary>    classCalrate:calfather {/// <summary>        ///Discount rate attribute/// </summary>         Public DoubleRate {Get; Set; }         PublicCalrate (DoubleRate ) {             This. Rate =Rate ; }         Public Override DoubleGettotalmoney (DoubleRealmoney) {            returnRealmoney * This.        rate; }    }

Discount method of M minus N

    /// <summary>    ///buy m yuan send n yuan/// </summary>    classCalmn:calfather {//buy 500 Send//buy 300 Get off        /// <summary>        ///Buy the number/// </summary>         Public DoubleM {Get; Set; }        /// <summary>        ///number of sent/// </summary>         Public DoubleN {Get; Set; }         PublicCALMN (DoubleMDoubleN) { This. M =m;  This. N =N; }         Public Override DoubleGettotalmoney (DoubleRealmoney) {            if(Realmoney >= This. M) {returnRealmoney-(int) (Realmoney/ This. M) * This.            N }            Else            {                returnRealmoney; }        }    }

Main function

    class program    {        staticvoid Main (string[] args)        {            //  Create a Supermarket object            new  suppermarket ()                        ; // Show Goods             SM. Shwopros ();             // Interacting with users             SM. Askbuying ();            Console.readkey ();        }    }

. NET Study notes----2015-06-30 (supermarket cashier system 02)