bandstrio.blogg.se - Cal coderunner

#CAL CODERUNNER HOW TO#
#CAL CODERUNNER CODE#

Typed constants can be compared to initialized variables - variables whose values are defined on entry to their block. Redeclaration creates a new variable using the same identifier, without affecting the value of the original variable. The variable can then be referred to throughout the block unless the identifier is redeclared in an enclosed block. When an identifier is specified within the identifier list of a variable declaration, that identifier is a variable identifier for the block in which the declaration occurs. The type given for the variable(s) can be a type identifier previously declared in a type declaration part in the same block, in an enclosing block, it can also be a new type definition.

A variable declaration is a list of identifiers that designate new variables and their types. (Explained in more detail soon).Ī variable is an identifier that marks a value that can change.

Because the methods are independent of each other and the program, each method may be exported to other programs and reused there.

You may easily substitute methods with alternatives or optimized replacements.

The order of the actions can be easily changed.

Because the methods are separate, each one can be modified or replaced very easily.

This helps the programmer under the program.

Different actions are placed in different methods.

The program shows its structure clearly in the program listing.

This program structure has several purposes: Instead of having three if-then comparisons, we elected to use the case command to make the decision of what should be displayed. The procedure act, one decision with multiple alternatives.īasically, the act must choose between three alternatives, using a number to control the choice.

The last decision is to repeat the loop or exit based upon the value entered.

Another decision is to display an error message if required.One decision is made based upon the value entered.The function choose, several decisions are made. then it displays a title and 3 menu choices.lastly calls act, takes an action depending upon the user's choice.then it calls choose, accepts the user's input entered at the keyboard.it calls tell, displays to the user the acceptable choices.There are three methods called by the Begin and End. Session.Write('You chose '+IntToStr(Choice)+', so I am starting ') ġ:Session.WriteLn('the coffee maker.') ģ:Session.WriteLn('the pencil sharpener.') Result:=Choice // Forgetting to set your function result will break everything! Start the electric pencil sharpener.') Ĭhoice:=StrToIntDef(Session.Ask('Enter 1,2 or 3',' ',False,False),-1) WriteLn('Official Presidential Control Panel')

#CAL CODERUNNER CODE#

No matter how much code you have written, if the " Begin" and " End." do nothing, your program does nothing.

The code in the " Begin" and " End." determines what your program does.

When the Program is executed, the " Begin" and " End." are executed, and all code after the " End." is ignored.

Each Program must have a " Begin" and " End.".

The Program is the product as a whole, defining the goal and then through code implementing the functionality to achieve the goal. In this chapter, we will address the Program, Data, Looping, Logic and a little on Objects. We call this write the Program Control, think of it as an executive summary.

#CAL CODERUNNER HOW TO#

Next, however, is learning how to use them and when.

Understanding what reserved words and keywords exist is vital to learning any programming language.