How do you Print a Procedure?

There are two types of variables, called LOCOAL VARIABLES used in a procedure or a function. The first ones are the parameter-variables you give as arguments to the procedure, and the second ones are internal variables of the procedure.

procedure WriteToFile(YourName : String);

Var
  YourCode : Byte;

You see, the variable YourName is an argument variable, the parameter of the procedure and YourCode is an internal, local variable.

Note, you can't access local variables from any others points in your programs. They're only avaiable in their procedures or functions, this is why they are called local variables. the opposit of a local variable is a global variable.

So ok, enough of "book stuff"

below you see a procedure, that writes some variables and constants into a file, and how to call that from a program :


Program Examples;

Uses
  Crt;

Var
  WriteTo : String;

Procedure WriteToFile(FileName : String);

Var
  FirstName  : String[20];
  FamilyName : String[20];
  Age        : Byte;
  FileHandle : Text;

Begin
  WriteLn;
  WriteLn('This text comes from the procedure..');
  WriteLn;
  WriteLn('Enter your Name : ');
  ReadLn(FirstName);
  WriteLn;
  WriteLn('Enter your Family Name : ');
  ReadLn(FamiliyName);
  WriteLn;
  WriteLn('Enter your Age : ');
  ReadLn(Age);
  Assign(FileHandle, FileName);
  Rewrite(FileHandle);
  WriteLn(FileHandle);
  WriteLn(FileHandle, 'This is an auto-generated file.');
  WriteLn(FileHandle);
  WriteLn(FileHandle, 'His/Her Name is ',FirstName);
  WriteLn(FileHandle, 'His/Her Family Name is ',FamilyName);
  WriteLn(FileHandle, 'His/Her Age is ',Age);
  WriteLn(FileHandle);
  Close(FileHandle);
  WriteLn;
End;

Begin
  WriteLn;
  WriteLn('Enter the file you wanna write in...');
  ReadLn(WriteTo);
  WriteToFile(WriteTo);
End.

That's all. If you need some others, like reading writing binary files or you need additional info, u may leave a comment. I didnt include any IO (input - output checks) to keep the example code small.

Hope that helps, greets, Omsec

Thanks for the reply!

I just need a little extra. In your example, if I wanted say, just the first & last name written to the screen and all of it written to a text file, how would I do this using the same procedure? Again, if this is possible.

Basically, if I was using this procedure to calculate the results of 3 variables x,y,z and I had to make 2 calls from the main program to this procedure( 1st call to print x and y to screen and 2nd call to print x,y,z to a text)how could I do this without printing x,y,z to the screen.

I need to find the most efficient way of using a procedure without duplicating its contents throughout the program.

Thanks in advance!

Pyramid

Have you ever heard of redirection ??
You must NOT use crt, (or set the variable "direct video" to false).

example, if you executable is test.exe you could enter this:

test > output.txt

In the file output.txt you will see the results you would otherwise see on the screen. The values in the writeln statements will be put into the file..

I hope this is the correct answer.. (I may have misunderstood your question !!)

i dont think that is what he asked

Hi!

Thanks for the reply, Nibbler. To be honest with you, I really have no idea what you are talking about. I don't know that much about pascal. Omsec's reply is a lot closer to the answer I'm looking for. I do appreciate your help, though. If anybody needs any clarification on this problem please ask me.

Thanks,

Pyramid

Hi!

Your answer seemed to work ok with a few modifications but it did work.

Thanks,

Pyramid