static void Main (String[] args)
{
/* my first program in C# */
Console.WriteLine("Hello World");
BinaryS bs = new BinaryS ();
int num = 20;
bs.finds(num);
Console.ReadKey ();
// File is a collecation of data stored in a disk with a specific name and a directory path
// When file is opened for reading or writing, it become a stream
// Input stream is using for reading data from file - read operation
// Output stream is using for writing into the file - write operation
// filestream helps in reading from, writing to and closing files
// FileStream <object_name> = new FileStream(<file_name>, <FileMode Enumerator>,
// <FileAccess Enumerator>, <FileShare Enumerator>);
// FileStream F = new FileStream("sample.txt", FileMode.Open, FileAccess.Read, FileShare.Read);
FileStream F = new FileStream ("test.dat", FileMode.OpenOrCreate, FileAccess.ReadWrite);
for (int i=1; i<=20; i++ )
{
F.WriteByte((byte)i);
}
F.Position = 0;
for (int i=0; i<=20; i++)
{
Console.Write(F.ReadByte()+" ");
}
F.Close ();
Console.ReadKey ();
string str = "A thousand Splends Suns";
string str1 = "make maze and manage to measure it";
RegEx r = new RegEx ();
Console.WriteLine ("Matching Words that start with 's' :");
r.showMatch(str, @"\bS\S*");
r.showMatch (str1,@"\bm\S*e\b");
Console.ReadKey ();
Transcation t1 = new Transcation ("001", "08/10/2012", 78900.00);
Transcation t2 = new Transcation ("002", "09/10/2012", 98700.00);
t1.showTransaction ();
t2.showTransaction ();
Console.ReadKey ();
Box Box1 = new Box (); // Declare Box1 of type Box
Box Box2 = new Box (); // Declare Box1 of type Box
Box Box3 = new Box (); // Declare Box1 of type Box
double volume = 0.0; // Stroe the volume of box here
// Box 1 Specification
Box1.setBreath (6.0);
Box1.setHeight (7.0);
Box1.setLength (8.0);
// Box 2 Specification
Box2.setBreath (10.0);
Box2.setHeight (11.0);
Box2.setLength (12.0);
// Volume
Console.WriteLine ("Box1: {0}", Box1.ToString());
Console.WriteLine ("Box2: {0}", Box2.ToString());
volume = Box1.getVolume ();
Console.WriteLine ("Volume of Box1 : {0}", volume);
volume = Box2.getVolume ();
Console.WriteLine ("Volume of Box2 : {0}", volume);
// + is operator
Box3 = Box1 + Box2;
volume = Box3.getVolume ();
Console.WriteLine ("Volume of Box3: {0}", volume);
Console.ReadKey ();
// Interface is defined as a syntactical contract that all the classes inheriting the interface should follow
// Interface defines the "What" Part of the syntactical contract
// Deriving class defines the "How" part of the syntactical contract
Rectangle r1 = new Rectangle ();
r1.Details();
r1.GetArea();
r1.Displays();
Console.ReadKey();
Console.WriteLine ("Find the Max: ");
/* local variable definition */
int ret;
int l = 100;
int v = 20;
NumberManipulator n = new NumberManipulator();
// calling the FindMax method
ret = n.FindMax(l, v);
Console.WriteLine("Max value is : {0}", ret );
Console.ReadLine();
Console.WriteLine ("Factorial: ");
//calling the factorial method
Console.WriteLine("Factorial of 6 is : {0}", n.factorial(6));
Console.WriteLine("Factorial of 7 is : {0}", n.factorial(7));
Console.WriteLine("Factorial of 8 is : {0}", n.factorial(8));
Console.ReadLine();
Console.WriteLine ("Swap L and V");
Console.WriteLine("Before swap, value of l : {0}", l);
Console.WriteLine("Before swap, value of v : {0}", v);
n.swap1 (l, v);
Console.WriteLine("After swap, value of l : {0}", l);
Console.WriteLine("After swap, value of v : {0}", v);
Console.WriteLine("Parameter inside the method have no effect - Passing Parameters By Value");
Console.ReadLine();
Console.WriteLine ("Swap L and V");
Console.WriteLine("Before swap, value of l : {0}", l);
Console.WriteLine("Before swap, value of v : {0}", v);
n.swap2 (ref l, ref v);
Console.WriteLine("After swap, value of l : {0}", l);
Console.WriteLine("After swap, value of v : {0}", v);
Console.WriteLine("Parameter inside the method have effect - Passing Parameters By Reference");
Console.ReadLine();
Console.WriteLine ("Change Output 100 to 5");
/* local variable definition */
int o = 100;
Console.WriteLine("Before method call, value of 100 : {0}", o);
/* calling a function to get the value */
n.getValue(out o);
Console.WriteLine("After method call, value of 100 : {0}", o);
Console.WriteLine("Parameter inside the method have effect- Passing Parameters By Output");
Console.ReadLine();
Console.WriteLine ("Change Output 100 and 20");
n.getValues(out l, out v);
Console.WriteLine("After method call, value of 100 : {0}", l);
Console.WriteLine("After method call, value of 20 : {0}", v);
Console.ReadLine();
Console.WriteLine ("C# Size of Value Type");
Console.WriteLine("Size of bool: {0}\t\t\t\t\t\t", sizeof(bool));
Console.WriteLine("Size of byte: {0}\t\t\t\t\t\t", sizeof(byte));
Console.WriteLine("Size of short: {0}\t\t\t\t\t", sizeof(short));
Console.WriteLine("Size of char: {0}\t\t\t\t\t\t", sizeof(char));
Console.WriteLine("Size of int: {0}\t\t\t\t\t\t\t", sizeof(int));
Console.WriteLine("Size of float: {0}\t\t\t\t\t\t", sizeof(float));
Console.WriteLine("Size of double: {0}\t\t\t\t\t\t", sizeof(double));
Console.WriteLine("Size of long: {0}\t\t\t\t\t\t", sizeof(long));
Console.WriteLine("Size of decimal: {0}\t\t\t\t\t", sizeof(decimal));
Console.WriteLine("Size of sbyte: {0}\t\t\t\t\t\t", sizeof(sbyte));
Console.WriteLine("Size of ushort: {0}\t\t\t\t\t\t", sizeof(ushort));
Console.WriteLine("Size of uint: {0}\t\t\t\t\t\t\t", sizeof(uint));
Console.WriteLine("Size of ulong: {0}\t\t\t\t\t\t", sizeof(ulong));
Console.ReadKey();
Console.WriteLine ("Explicit Type Conversion");
double d = 5673.74;
// pre-defined functions
int p;
// cast double to int.
p = (int)d;
Console.WriteLine ("Double: "+d);
Console.WriteLine("(int)Double: "+p);
Console.ReadKey();
Console.WriteLine ("Converts various Value types to String type");
int e = 75;
float f = 53.005f;
double g = 2345.7652;
bool h = true;
Console.WriteLine("Int.ToString: "+e.ToString());
Console.WriteLine("Float.ToString: "+f.ToString());
Console.WriteLine("Double.ToString: "+g.ToString());
Console.WriteLine("Boolean.ToString: "+h.ToString());
Console.ReadKey();
Console.WriteLine ("Different Variables: ");
short a;
int b ;
double c;
/* actual initialization */
a = 10;
b = 20;
c = a + b;
/* Index{0} Index{1} Index{2} */
Console.WriteLine("a = {0}, b = {1}, c = {2}. ", a, b, c);
Console.ReadLine();
Console.WriteLine ("Variables Constant");
const double pi = 3.14159;
// Constant Declaration
double radius;
Console.WriteLine("Enter Radius: ");
radius = Convert.ToDouble(Console.ReadLine());
double areaCircle = pi * radius * radius;
// Pi is Constant Value
Console.WriteLine("Radius: {0}, Area: {1}. ", radius, areaCircle);
Console.ReadLine();
Console.WriteLine("Logical Operation:");
int x = 60; /* 60 = 0011 1100 */
int y = 13; /* 13 = 0000 1101 */
int z = 0;
z = x & y; /* 12 = 0000 1100 */
Console.WriteLine("Line 1 - Value of z is {0}", z );
z = x | y; /* 61 = 0011 1101 */
Console.WriteLine("Line 2 - Value of z is {0}", z);
z = x ^ y; /* 49 = 0011 0001 */
Console.WriteLine("Line 3 - Value of z is {0}", z);
z = ~x; /* -61 = 1100 0011 */
Console.WriteLine("Line 4 - Value of z is {0}", z);
z = x << 2; /* 240 = 1111 0000 */
Console.WriteLine("Line 5 - Value of z is {0}", z);
z = x >> 2; /* 15 = 0000 1111 */
Console.WriteLine("Line 6 - Value of z is {0}", z);
Console.ReadLine();
Console.WriteLine ("Relational Operation: ");
if (a == b)
{
Console.WriteLine("Line 1 - a is equal to b");
}
else
{
Console.WriteLine("Line 1 - a is not equal to b");
}
if (a < b)
{
Console.WriteLine("Line 2 - a is less than b");
}
else
{
Console.WriteLine("Line 2 - a is not less than b");
}
if (a > b)
{
Console.WriteLine("Line 3 - a is greater than b");
}
else
{
Console.WriteLine("Line 3 - a is not greater than b");
}
/* Lets change value of a and b */
a = 10000;
b = 20;
if (a <= b)
{
Console.WriteLine("Line 4 - a is either less than or equal to b");
}
else
{
Console.WriteLine ("Line 4 - a is greater than b");
}
if (b >= a)
{
Console.WriteLine("Line 5 - b is either greater than or equal to b");
}
else
{
Console.WriteLine ("Line 5 - b is less than a");
}
Console.ReadKey ();
Console.WriteLine ("Case Statement: ");
char grade = 'A';
switch (grade)
{
case 'A':
Console.WriteLine("Excellent!");
break;
case 'B':
case 'C':
Console.WriteLine("Well done");
break;
case 'D':
Console.WriteLine("You passed");
break;
case 'F':
Console.WriteLine("Better try again");
break;
default:
Console.WriteLine("Invalid grade");
break;
}
Console.WriteLine("Your grade is {0}", grade);
Console.ReadLine();
Console.WriteLine ("Find the Prime: ");
/* local variable definition */
int w, u;
for (w = 2; w < 100; w++)
{
for (u = 2; u <= (w / u); u++)
if ((w % u) == 0) break; // if factor found, not prime
if (u > (w / u))
Console.WriteLine("{0} is prime", w);
}
Console.ReadLine();
// Abstraction allows making relevant information visible
// Encapsulation - Public, Private, Protected, Internal, Protected Internal
// Default access specifier of a class member - Private
}
// Overload + Operateor to add two Box Object
public static Box operator+ (Box b, Box c)
{
Box box = new Box();
box.length = b.length + c.length;
box.breath = b.breath + c.breath;
box.height = b.height + c.height;
return box;
}
