public Parent() {
this.c1 = new child1();
this.c2 = new child2();
this.c3 = new child3();
this.c4 = new child4();
this.c5 = new child5();
}
static void Main(string[] args)
{
child1 ch1 = new child1();
ch1.message();
child2 ch2 = new child2();
ch2.message();
}
public static void Main(String[] args)
{
child1 c1 = new child1();
c1.contract_salary = 35000;
c1.perm_salary = 70000;
c1.totalSalary();
child2 c2 = new child2();
c2.contract_salary = 35000;
c2.perm_salary = 70000;
c2.totalSalary();
((Base1)c1).totalSalary();//type casting n using the parent class method with child class type--now returns the total salary
Console.ReadLine();
}
static void Main(string[] args)
{
// The code provided will print ‘Hello World’ to the console.
// Press Ctrl+F5 (or go to Debug > Start Without Debugging) to run your app.
string[] fullnames = { "Anne Williams", "John SOTO", "Juan Perez" };
IEnumerable <string> queryMany = from full in fullnames
from name2 in full.Split()
select name2;
IEnumerable <string> queryMany2 = fullnames.SelectMany(nn => nn.Split());
foreach (var item in queryMany)
{
Console.WriteLine(item);
}
Console.ReadLine();
childClass1 child1 = new childClass1();
child1.fieldProtected = 65;
child2 child2 = new child2();
//child2.fieldProtectedInterface = 3232;
float typeFloat = 54.97494595f;
double typeDouble;
decimal typeDecimal;
typeDouble = typeFloat;
typeDecimal = (decimal)(typeFloat);
// typeDecimal = Convert.ToDecimal( typeFloat);
Console.WriteLine($"Float: {typeFloat}");
Console.WriteLine($"Double: {typeDouble}");
Console.WriteLine($"Decimal: {typeDecimal}");
// Console.WriteLine(typeDouble);
Console.WriteLine();
//double to float
double typeDouble2 = 77.45962;
float typeFloat2;
// explicit : double -> float
typeFloat = (float)(typeDouble2);
//implicit: -> float to double
typeDouble2 = typeFloat;
// Decimal to double
decimal typeDecimal2;
typeDecimal2 = (decimal)typeDouble2;
// all integrap convertedt to all floating points
int i = 1;
float f = i;
//reverse
int i2 = (int)f;
//Double to int
double varDouble = 45.55;
// explicit : double -> int
int varInt = (int)varDouble;
Console.WriteLine(varInt);
// implicit> int -> double
int intVarD = 48;
varDouble = intVarD;
// floating poitn number to integral ANY FRACTION PORTION IS TRUNCATED
// No rounding is performed
// ** System.Convert -> method to Round while converting
int x = int.MaxValue;
int y = x + 1; // unchecked(x + 1);
// int xx = int.MaxValue + 1; // complilte time error
int a = 1000000;
int b = 1000000;
// ommmited int c = checked(a * b); // Checks just the expression.
// / -16 Bit Integrals
// The 8 - and 16 - bit integral types are byte, sbyte, short, and ushort.
// These types LACK their own arithmetic operators,
// so C# implicitly converts them to larger types as required. This can cause a compile-time error when trying to assign the result back to a small integral
short xxx = 1, yyy = 1;
// short z = xxx + yyy; // Compile-time error
// case, xxx and yyy are implicitly converted to int so that the addition can be performed.
// To make this compile, we must add an explicit cast:
short zz = (short)(xxx + yyy); // OK
//Special float
Console.WriteLine(double.NegativeInfinity); // -Infinity
Console.WriteLine(1.0 / 0.0); // Infinity
Console.WriteLine(-1.0 / 0.0); // -Infinity
Console.WriteLine(1.0 / -0.0); // -Infinity
Console.WriteLine(-1.0 / -0.0); // Infinity
Console.WriteLine(0.0 / 0.0); // NaN
Console.WriteLine((1.0 / 0.0) - (1.0 / 0.0)); // NaN
Console.WriteLine((1.0 / 0.0) - (-1.0)); // ??
// When using = =, a NaN value is never equal to another value, even another NaN value:
Console.WriteLine(0.0 / 0.0 == double.NaN); // False
//
Console.WriteLine(double.IsNaN(0.0 / 0.0)); // True
// When using object.Equals, however, two NaN values are equal:
Console.WriteLine(object.Equals(0.0 / 0.0, double.NaN)); // True
Console.WriteLine("Hello World!");
Console.ReadKey();
// Go to http://aka.ms/dotnet-get-started-console to continue learning how to build a console app!
// get vowels
string[] list = { "ABC", "Francisco" };
IEnumerable <string> query = from n in list
where n[0] == "F".ToCharArray()[0]
select n;
//OTHER FORMATS
decimal value = 123.456m;
Console.WriteLine("Your account balance is {0:C3}.", value);
Console.ReadKey();
string name = "Rob";
int age = 21;
Console.WriteLine("Your name is {0} and your age is {1,15:D}", name, age);
decimal[] amounts = { 16305.32m, 18794.16m };
Console.WriteLine(" Beginning Balance Ending Balance");
Console.WriteLine(" {0,-28:C2}{1,14:C2}", amounts[0], amounts[1]);
// FORMAT:
Temperature temp1 = new Temperature(0);
Console.WriteLine("{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)\n", temp1);
Console.ReadKey();
// Use composite formatting with a format provider.
temp1 = new Temperature(-40);
Console.WriteLine(String.Format(CultureInfo.CurrentCulture, "{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)", temp1));
Console.WriteLine(String.Format(new CultureInfo("fr-FR"), "{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)\n", temp1));
// Call ToString method with format string.
temp1 = new Temperature(32);
Console.WriteLine("{0} (Celsius) = {1} (Kelvin) = {2} (Fahrenheit)\n",
temp1.ToString("C"), temp1.ToString("K"), temp1.ToString("F"));
}