static void Main(string[] args)
{
sbyte a1 = 1;
System.SByte a2 = 1;
byte b1 = 2;
System.Byte b2 = 2;
short c1 = 3;
System.Int16 c2 = 3;
ushort d1 = 4;
System.UInt16 d2 = 4;
int e1 = 5;
System.Int32 e2 = 5;
uint f1 = 6;
System.UInt32 f2 = 6;
long g1 = 7;
System.Int64 g2 = 7;
ulong h1 = 8;
System.UInt64 h2 = 8;
char i1 = 'a';
System.Char i2 = 'a';
float k1 = 10;
System.Single k2 = 10;
double l1 = 11;
System.Double l2 = 11;
bool m1 = true;
System.Boolean m2 = true;
decimal n1 = 12;
System.Decimal n2 = 12;
object o1 = new object { };
System.Object o2 = new object { };
string p1 = "Hello";
System.String p2 = "Hello";
Console.WriteLine(a1.GetType() + "\n" + a2.GetType() + "\n" +
b1.GetType() + "\n" + b2.GetType() + "\n" +
c1.GetType() + "\n" + c2.GetType() + "\n" +
d1.GetType() + "\n" + d2.GetType() + "\n" +
e1.GetType() + "\n" + e2.GetType() + "\n" +
f1.GetType() + "\n" + f2.GetType() + "\n" +
g1.GetType() + "\n" + g2.GetType() + "\n" +
h1.GetType() + "\n" + h2.GetType() + "\n" +
i1.GetType() + "\n" + i2.GetType() + "\n" +
k1.GetType() + "\n" + k2.GetType() + "\n" +
l1.GetType() + "\n" + l2.GetType() + "\n" +
m1.GetType() + "\n" + m2.GetType() + "\n" +
n1.GetType() + "\n" + n2.GetType() + "\n" +
o1.GetType() + "\n" + o2.GetType() + "\n" +
p1.GetType() + "\n" + p2.GetType() + "\n");
}
static void Main(string[] args)
{
Console.WriteLine("***** Data Types *****");
// 12 is-a System.Int32 which is-a System.ValueType
// which is-a System.Object.
Console.WriteLine(12.GetHashCode());
Console.WriteLine(12.Equals(23));
Console.WriteLine(12.GetType().BaseType);
Console.WriteLine(12.ToString());
Console.WriteLine(12); // ToString() called automatically.
// Exercise a ushort.
Console.WriteLine("\n***** Fun with unsigned shorts *****");
System.UInt16 myUInt16 = 30000;
Console.WriteLine("Max for an UInt16 is: {0} ", UInt16.MaxValue);
Console.WriteLine("Min for an UInt16 is: {0} ", UInt16.MinValue);
Console.WriteLine("Value is: {0} ", myUInt16);
Console.WriteLine("I am a: {0} ", myUInt16.GetType());
// Now in System.UInt16 shorthand (e.g. a ushort).
ushort myOtherUInt16 = 12000;
Console.WriteLine("Max for an UInt16 is: {0} ", ushort.MaxValue);
Console.WriteLine("Min for an UInt16 is: {0} ", ushort.MinValue);
Console.WriteLine("Value is: {0} ", myOtherUInt16);
Console.WriteLine("I am a: {0} ", myOtherUInt16.GetType());
Console.WriteLine("\n***** Fun with doubles *****");
Console.WriteLine("-> double.Epsilon: {0}", double.Epsilon);
Console.WriteLine("-> double.PositiveInfinity: {0}", double.PositiveInfinity);
Console.WriteLine("-> double.NegativeInfinity: {0}", double.NegativeInfinity);
Console.WriteLine("-> double.MaxValue: {0}", double.MaxValue);
Console.WriteLine("-> double.MinValue: {0}", double.MinValue);
Console.WriteLine("\n***** Fun with bools *****");
// No more ad-hoc Boolean types in C#!
// bool b = 0; // Illegal!
// bool b2 = -1; // Also illegal!
bool b3 = true; // No problem.
bool b4 = false; // No problem.
Console.WriteLine("-> bool.FalseString: {0}", bool.FalseString);
Console.WriteLine("-> bool.TrueString: {0}", bool.TrueString);
// Test the truth of the following statements...
Console.WriteLine("\n***** Fun with chars *****");
Console.WriteLine("-> char.IsDigit('K'): {0}", char.IsDigit('K'));
Console.WriteLine("-> char.IsDigit('9'): {0}", char.IsDigit('9'));
Console.WriteLine("-> char.IsLetter('10', 1): {0}", char.IsLetter("10", 1));
Console.WriteLine("-> char.IsLetter('p'): {0}", char.IsLetter('p'));
Console.WriteLine("-> char.IsWhiteSpace('Hello There', 5): {0}",
char.IsWhiteSpace("Hello There", 5));
Console.WriteLine("-> char.IsWhiteSpace('Hello There', 6): {0}",
char.IsWhiteSpace("Hello There", 6));
Console.WriteLine("-> char.IsLetterOrDigit('?'): {0}",
char.IsLetterOrDigit('?'));
Console.WriteLine("-> char.IsPunctuation('!'): {0}",
char.IsPunctuation('!'));
Console.WriteLine("-> char.IsPunctuation('>'): {0}",
char.IsPunctuation('>'));
Console.WriteLine("-> char.IsPunctuation(','): {0}",
char.IsPunctuation(','));
// Test the truth of the following statements...
Console.WriteLine("\n***** Fun with parsing *****");
bool myBool = bool.Parse("True");
Console.WriteLine("-> Value of myBool: {0}", myBool);
double myDbl = double.Parse("99.884");
Console.WriteLine("-> Value of myDbl: {0}", myDbl);
int myInt = int.Parse("8");
Console.WriteLine("-> Value of myInt: {0}", myInt);
char myChar = char.Parse("w");
Console.WriteLine("-> Value of myChar: {0}\n", myChar);
Console.WriteLine("\n***** Fun with DateTime *****");
// This constructor takes (year, month, day)
DateTime dt = new DateTime(2004, 10, 17);
// What day of the month is this?
Console.WriteLine("The day of {0} is {1}", dt.Date, dt.DayOfWeek);
dt.AddMonths(2); // Month is now December.
Console.WriteLine("Daylight savings: {0}", dt.IsDaylightSavingTime());
Console.WriteLine("\n***** Fun with TimeSpan *****");
// This constructor takes (hrs, minutes, seconds)
TimeSpan ts = new TimeSpan(4, 30, 0);
Console.WriteLine(ts);
// Subtract 15 minutes from the current TimeSpan and
// print the result.
Console.WriteLine(ts.Subtract(new TimeSpan(0, 15, 0)));
Console.ReadLine();
}
static void Main(string[] args)
{
bool a = true;
System.Boolean a1 = false;
System.Type[] a2 = { a.GetType(), a1.GetType() };
foreach (var item in a2)
{
Console.Write(item.ToString() + "\n");
}
byte b = 10;
System.Byte b1 = 11;
System.Type[] b2 = { b.GetType(), b1.GetType() };
foreach (var item in b2)
{
Console.Write(item.ToString() + "\n");
}
sbyte c = 22;
System.SByte c1 = 23;
System.Type[] c2 = { c.GetType(), c1.GetType() };
foreach (var item in c2)
{
Console.Write(item.ToString() + "\n");
}
short d = -33;
System.Int16 d1 = -34;
System.Type[] d2 = { d.GetType(), d1.GetType() };
foreach (var item in d2)
{
Console.Write(item.ToString() + "\n");
}
ushort e = 33;
System.UInt16 e1 = 34;
System.Type[] e2 = { e.GetType(), e1.GetType() };
foreach (var item in e2)
{
Console.Write(item.ToString() + "\n");
}
int f = 44;
System.Int32 f1 = 45;
System.Type[] f2 = { f.GetType(), f1.GetType() };
foreach (var item in f2)
{
Console.Write(item.ToString() + "\n");
}
uint g = 55;
System.UInt32 g1 = 56;
System.Type[] g2 = { g.GetType(), g1.GetType() };
foreach (var item in g2)
{
Console.Write(item.ToString() + "\n");
}
long h = -555;
System.Int64 h1 = -556;
System.Type[] h2 = { h.GetType(), h1.GetType() };
foreach (var item in h2)
{
Console.Write(item.ToString() + "\n");
}
ulong i = 555;
System.UInt64 i1 = 556;
System.Type[] i2 = { i.GetType(), i1.GetType() };
foreach (var item in i2)
{
Console.Write(item.ToString() + "\n");
}
float j = 666;
System.Single j1 = 667;
System.Type[] j2 = { j.GetType(), j1.GetType() };
foreach (var item in j2)
{
Console.Write(item.ToString() + "\n");
}
double k = 777;
System.Double k1 = 778;
System.Type[] k2 = { k.GetType(), k1.GetType() };
foreach (var item in k2)
{
Console.Write(item.ToString() + "\n");
}
decimal l = 888;
System.Decimal l1 = 889;
System.Type[] l2 = { l.GetType(), l1.GetType() };
foreach (var item in l2)
{
Console.Write(item.ToString() + "\n");
}
char m = 'a';
System.Char m1 = 'b';
System.Type[] m2 = { m.GetType(), m1.GetType() };
foreach (var item in m2)
{
Console.Write(item.ToString() + "\n");
}
string n = "Hello";
System.String n1 = "Bye";
System.Type[] n2 = { n.GetType(), n1.GetType() };
foreach (var item in n2)
{
Console.Write(item.ToString() + "\n");
}
Console.ReadLine();
}
static void Main(string[] args)
{
// объявляю все переменные двумя способами
sbyte a1 = 1;
System.SByte a2 = 2;
short b1 = 3;
System.Int16 b2 = 4;
int c1 = 5;
System.Int32 c2 = 6;
long d1 = 7;
System.Int64 d2 = 8;
byte e1 = 9;
System.Byte e2 = 10;
ushort f1 = 11;
System.UInt16 f2 = 12;
uint g1 = 13;
System.UInt32 g2 = 14;
ulong h1 = 15;
System.UInt64 h2 = 16;
char i1 = 'A';
System.Char i2 = 'B';
float j1 = 17.1F;
System.Single j2 = 17.2F;
double k1 = 17.11;
System.Double k2 = 17.22;
bool l1 = false;
System.Boolean l2 = true;
decimal m1 = 1.1M;
System.Decimal m2 = 2.2M;
object n1 = 18;
System.Object n2 = 19;
string o1 = "Hi!";
System.String o2 = "Bye!";
//получаю типы этих переменных
Type nameA1 = a1.GetType();
Type nameA2 = a2.GetType();
Type nameB1 = b1.GetType();
Type nameB2 = b2.GetType();
Type nameC1 = c1.GetType();
Type nameC2 = c2.GetType();
Type nameD1 = d1.GetType();
Type nameD2 = d2.GetType();
Type nameE1 = e1.GetType();
Type nameE2 = e2.GetType();
Type nameF1 = f1.GetType();
Type nameF2 = f2.GetType();
Type nameG1 = g1.GetType();
Type nameG2 = g2.GetType();
Type nameH1 = h1.GetType();
Type nameH2 = h2.GetType();
Type nameI1 = i1.GetType();
Type nameI2 = i2.GetType();
Type nameJ1 = j1.GetType();
Type nameJ2 = j2.GetType();
Type nameK1 = k1.GetType();
Type nameK2 = k2.GetType();
Type nameL1 = l1.GetType();
Type nameL2 = l2.GetType();
Type nameM1 = m1.GetType();
Type nameM2 = m2.GetType();
Type nameN1 = n1.GetType();
Type nameN2 = n2.GetType();
Type nameO1 = o1.GetType();
Type nameO2 = o2.GetType();
//вывожу типы переменных на консоль
Console.WriteLine(nameA1);
Console.WriteLine(nameA2);
Console.WriteLine(nameB1);
Console.WriteLine(nameB2);
Console.WriteLine(nameC1);
Console.WriteLine(nameC2);
Console.WriteLine(nameD1);
Console.WriteLine(nameD2);
Console.WriteLine(nameE1);
Console.WriteLine(nameE2);
Console.WriteLine(nameF1);
Console.WriteLine(nameF2);
Console.WriteLine(nameG1);
Console.WriteLine(nameG2);
Console.WriteLine(nameH1);
Console.WriteLine(nameH2);
Console.WriteLine(nameI1);
Console.WriteLine(nameI2);
Console.WriteLine(nameJ1);
Console.WriteLine(nameJ2);
Console.WriteLine(nameK1);
Console.WriteLine(nameK2);
Console.WriteLine(nameL1);
Console.WriteLine(nameL2);
Console.WriteLine(nameM1);
Console.WriteLine(nameM2);
Console.WriteLine(nameN1);
Console.WriteLine(nameN2);
Console.WriteLine(nameO1);
Console.WriteLine(nameO2);
}
static void Main()
{
/*
* prefix s - simple type, primitive type, built in type, value type
* prefix f - .NET Framework type
*
* Numeric Types
*/
// signed 8 bit integer
sbyte sByte = -128;
System.SByte fByte = 127;
// unsigned 8 bit integer
byte sUnByte = 0;
System.Byte fUnByte = 255;
// signed 16 bit integer
short sShort = -32768;
System.Int16 fShort = 32767;
// unsigned 16 bit integer
ushort sUnShort = 0;
System.UInt16 fUnShort = 65535;
// signed 32 bit integer
int sInt = -2147483648;
System.Int32 fInt = 2_147_483_647;
// unsigned 32 bit integer
uint sUnInt = 0;
System.UInt32 fUnInt = 4_294_967_295;
// signed 64 bit integer
long sLong = -9_223_372_036_854_775_808;
System.Int64 fLong = 0x7FFFFFFFFFFFFFFF;
// unsigned 64 bit integer
ulong sUnLong = 0;
System.UInt64 fUnLong = System.UInt64.MaxValue;
// float 32 bit floating-point value (to initialize float use suffix 'f' or 'F')
float sFloat = -3.5F;
System.Single fFloat = 3.5f;
// double 64 bit floating-point value
double sDouble = System.Double.MinValue;
System.Double fDouble = System.Double.MaxValue;
// decimal 128 bit floating-point value (financial calculations)(use suffix m for real numbers)
decimal sDecimal = 300.5m;
System.Decimal fDecimal = 300;
// character data type
char sChar = 'a';
System.Char fChar = 'z';
// boolean type
bool trueValue = true;
bool falseValue = false; // default value for bool type
// write to console
Console.WriteLine("Type: {0}, Value: {1}", sByte.GetType(), sByte);
Console.WriteLine("Type: {0}, Value: {1}", fByte.GetType(), fByte);
Console.WriteLine("Type: {0}, Value: {1}", sUnByte.GetType(), sUnByte);
Console.WriteLine("Type: {0}, Value: {1}", fUnByte.GetType(), fUnByte);
Console.WriteLine("Type: {0}, Value: {1}", sShort.GetType(), sShort);
Console.WriteLine("Type: {0}, Value: {1}", fShort.GetType(), fShort);
Console.WriteLine("Type: {0}, Value: {1}", sUnShort.GetType(), sUnShort);
Console.WriteLine("Type: {0}, Value: {1}", fUnShort.GetType(), fUnShort);
Console.WriteLine("Type: {0}, Value: {1}", sInt.GetType(), sInt);
Console.WriteLine("Type: {0}, Value: {1}", fInt.GetType(), fInt);
Console.WriteLine("Type: {0}, Value: {1}", sUnInt.GetType(), sUnInt);
Console.WriteLine("Type: {0}, Value: {1}", fUnInt.GetType(), fUnInt);
Console.WriteLine("Type: {0}, Value: {1}", sLong.GetType(), sLong);
Console.WriteLine("Type: {0}, Value: {1}", fLong.GetType(), fLong);
Console.WriteLine("Type: {0}, Value: {1}", sUnLong.GetType(), sUnLong);
Console.WriteLine("Type: {0}, Value: {1}", fUnLong.GetType(), fUnLong);
Console.WriteLine("Type: {0}, Value: {1}", sFloat.GetType(), sFloat);
Console.WriteLine("Type: {0}, Value: {1}", fFloat.GetType(), fFloat);
Console.WriteLine("Type: {0}, Value: {1}", sDouble.GetType(), sDouble);
Console.WriteLine("Type: {0}, Value: {1}", fDouble.GetType(), fDouble);
Console.WriteLine("Type: {0}, Value: {1}", sDecimal.GetType(), sDecimal);
Console.WriteLine("Type: {0}, Value: {1}", fDecimal.GetType(), fDecimal);
Console.WriteLine("Type: {0}, Value: {1}", sChar.GetType(), sChar);
Console.WriteLine("Type: {0}, Value: {1}", fChar.GetType(), fChar);
Console.WriteLine("Type: {0}, Value: {1}", trueValue.GetType(), trueValue);
Console.WriteLine("Type: {0}, Value: {1}", falseValue.GetType(), falseValue);
// wait for user input to close the window
Console.WriteLine();
Console.Write("Press any key to continue...");
Console.ReadKey(true);
}
public static int Main(string[] args)
{
// Test value semantics.
System.Int32 intA = 1001;
System.Int32 intB = 1000;
if (intA == intB)
{
Console.WriteLine("Same value!\n");
}
else
{
Console.WriteLine("Not the same value!\n");
}
// Working with UInt16 as a wrapper.
System.UInt16 myUInt16 = 30000;
Console.WriteLine("Max for an UInt16 is: {0}", UInt16.MaxValue);
Console.WriteLine("Min for an UInt16 is: {0}", UInt16.MinValue);
Console.WriteLine("Your value is: {0}", myUInt16.ToString());
Console.WriteLine("I am a: {0}", myUInt16.GetType().ToString());
// Now in UInt16 shorthand (e.g. a ushort).
ushort myOtherUInt16 = 12000;
Console.WriteLine("\nYour value is: {0}", myOtherUInt16.ToString());
Console.WriteLine("I am a: {0}", myOtherUInt16.GetType().ToString());
// Boxing and unboxing.
Console.WriteLine("\nNow for some boxing...");
// Make a simple value.
short s = 25;
Console.WriteLine("short s = {0}", s);
Console.WriteLine("short is a: {0}\n", s.GetType().ToString());
// Box the value into a reference.
object objShort = s;
Console.WriteLine("Boxed object is a: {0}\n", objShort.GetType().ToString());
// Now, unbox the reference back into a short:
short anotherShort = (short)objShort;
Console.WriteLine("short anotherShort = {0}", anotherShort);
Console.WriteLine("Unboxed object is a: {0}", anotherShort.GetType().ToString());
// Bad unboxing!
try
{
// The type contained in the box is NOT a
// string, but a short!
string str = (string)objShort;
}
catch (InvalidCastException e)
{
Console.WriteLine("\nOOPS!\n{0}", e.ToString());
}
// Auto-box.
Console.WriteLine("\n\nThe Auto Box");
int x = 99;
Foo(x);
return(0);
}