static void Main(string[] args)
{
GradStatus gs = GradStatus.MagnaCumLaude;
var i = (int)gs;
if (gs == GradStatus.MagnaCumLaude)
{
}
}
static void Main(string[] args)
{
GradStatus gs = GradStatus.Magna;
var i = (int)gs; // casting-- turns one type into another. (Changing int to double)
if (gs == GradStatus.Magna)
{
}
}
static void Main(string[] args)
{
GradStatus gs1 = GradStatus.MagnaCumLaude; // MUST ALWAYS ASSIGN VALUE IN THIS QUIRKY WAY, I THINK: type.value
GradStatus gsZero = GradStatus.SummaCumLaude;
// gs1 = 1; //un-comment this, hover: Error message
// gs1 = "SummaCumLaude" hover. Same thing, for different reasons. This is a string.
// we are ONLY allowed to assign a few things to it. Restricted range.
var i = (int)gs1; // this is casting
if (gs1 == GradStatus.MagnaCumLaude)
{
Console.WriteLine(gs1);
Console.WriteLine(gs1.ToString()); // Console.WriteLine implicitly calls the ToString() method. Here it is, but explicit.
Console.WriteLine((int)gs1); // by default, the first member of an enum has value 0, the second value 1, ...
}
// An enum is a set of named constants
// An enum has a set range
// Every enumeration type has an UNDERLYING TYPE, which can be any integral numeric type.
// enums are USUALLY integer values, behind the scenes. Is always a value-type variable, but not all such variables are allowed.
// -int is the default type. Can be other numberic types. Cannot be char
//
// Enums do two things:
// 1. If your variable can only ever have certain meaningful values, such as the days of the week, or Cube Squarity, enums limit the values.
// 2. the names of the enumeration items can be very self-descriptive . Better than the old fashioned way, with codes such as 'C' for CumLaude
// Enum is mainly used to make code more readable by giving related constants a meaningful name. It also improves maintainability.
// Enums: Modular design. Easier. Fewer bugs.
// Another ex.: Days of the week.
// enum DaysOfWeek {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
// enum CubeSquarity {even, odd, evenSpecial, oddSpecial}
// enum ColorsOfFlower {purple, blue, yellow, pink, red}
/*
* CASTING
* Casting is one way (Eexist others I think) to change variable types.
* casting syntax: the type you want in parenths before the variable. double myDub = (double)i;
* int can always be cast to a double. Cast double to an int? --> truncation
* We will need to cast occasionally, not often.
*
* int i = 123;
* int j = 7;
* int k = i/j; // int divided by an int == an int.
* //So, instead:
* var k = (double)i/j; // as long as one of i or j is a double, this evaluates to double [in this case var k = double k]
*
*/
}