How to open a document in Free Pascal/Lazarus
To open a document file using it’s default application use OpenDocument function that exists in LCLIntf unit:
Object Oriented Programming in Free Pascal
Free Pascal supports Object Oriened programming paradigm as well as structured programming, so that it is a multi paradigm language. In this example we will define TCar as a class (type). This class contains attributes (variables) and methods (procedures and functions). Before using this class, we need to declare and inistantiate objects (variables of class).…
How to call procedure/function by reference in Free Pascal
If you want to call a procedure/function with variables and you want that procedure/function to modify parameters value, add var keyword in procedure/function parameter declaration: This type of passing parameters is called calling by reference it requires a variable with the same exact type to by passed and it will not work if a constant…
How to display current date and time in Free Pascal
You can use Now function to retreive current date and time from computer. Sample: Make sure you have included sysutils unit in uses clause. You can use FormatDateTime function to format date and time:
Free Pascal Answers 