问Pascal基本读写文件处理

EN

program BasicReadWrite;

type

  Person = record
        name: String;
        age: String;  // Should this be an integer? Why/Why not?
  end;

 personArray = array of Person;

procedure WriteLinesToFile(var myFile: TextFile; const pe: Person);
begin
    WriteLn(myFile, pe.age);
    WriteLn(myFile, pe.name);
end;

procedure PrintRecords(const ArrayOfPersons: personArray; count: Integer);
var
  p: Person;
begin
  setLength(p, ArrayOfPersons);
  for count:= 0 to high(ArrayOfPersons) do 
    begin
         p[count] := WriteLinesToFile();
    end;
end;

procedure ReadLinesFromFile(var myFile: TextFile);
var 
  p: Person;
  number: Integer;
  ArrayOfPersons: personArray;
begin
  for number:= 0 to 20 do 
    begin
       PrintRecords([number]);
    end;
end;

procedure Main();
var 
myFile: TextFile;
begin
  AssignFile(myFile, 'mytestfile.dat');
  ReWrite(myFile);  // Use ReWrite to open a file for writing 
  WriteLinesToFile(myFile);
  Close(myFile); // We need to close the file and re-open it, as Pascal
                // will not let you Read and write from a file at the same time.

  AssignFile(myFile, 'mytestfile.dat');
  Reset(myFile); // Open the file for reading.
  ReadLinesFromFile(myFile);
  Close(myFile);
end;

begin
  Main();
end.