Structures are good when grouping data

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Structures are good when grouping data. 
 
using System; 
 
// Define a packet structure. 
struct PacketHeader { 
  public uint packNum; // packet number 
  public ushort packLen; // length of packet 
} 
 
// Use PacketHeader to create an e-commerce transaction record. 
class Transaction { 
  static uint transacNum = 0; 
 
  PacketHeader ph;  // incorporate PacketHeader into Transaction 
  string accountNum; 
  double amount; 
 
  public Transaction(string acc, double val) { 
   // create packet header 
    ph.packNum = transacNum++;  
    ph.packLen = 512;  // arbitrary length 
 
    accountNum = acc; 
    amount = val; 
  } 
 
  // Simulate a transaction. 
  public void sendTransaction() { 
    Console.WriteLine("Packet #: " + ph.packNum + 
                      ", Length: " + ph.packLen + 
                      ",\n    Account #: " + accountNum + 
                      ", Amount: {0:C}\n", amount); 
  } 
} 
 
// Demonstrate Packet 
public class PacketDemo { 
  public static void Main() { 
    Transaction t = new Transaction("31243", -100.12); 
    Transaction t2 = new Transaction("AB4655", 345.25); 
    Transaction t3 = new Transaction("8475-09", 9800.00); 
 
    t.sendTransaction(); 
    t2.sendTransaction(); 
    t3.sendTransaction(); 
  } 
}

1.	Structs And Enums
2.	Define struct and use it
3.	Demonstrate a structure
4.	Copy a struct
5.	demonstrates a custom constructor function for a structure
6.	Defining functions for structs
7.	demonstrates using a structure to return a group of variables from a function
8.	Demonstates assignment operator on structures and classes.
9.	Issue an error message if you do not initialize all of the fields in a structure
10.	Illustrates the use of a struct
11.	C# always creates a structure instance as a value-type variable even using the new operator
12.	Calling a Function with a Structure Parameter
13.	Structs (Value Types):A Point Struct
14.	Structs (Value Types):Structs and Constructors
15.	Conversions Between Structs 1
16.	Conversions Between Structs 2

Structures are good when grouping data : struct « Class Interface « C# / C Sharp

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