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- (* Chapter 5 - Program 8 *)
- program Forward_Reference_Example;
-
- var Number_Of_Times : integer;
-
- procedure Write_A_Line(var Count : integer); forward;
-
- procedure Decrement(var Index : integer);
- begin
- Index := Index - 1;
- if Index > 0 then
- Write_A_Line(Index);
- end;
-
- procedure Write_A_Line;
- begin
- Writeln('The value of the count is now ',Count:4);
- Decrement(Count);
- end;
-
- begin (* main program *)
- Number_Of_Times := 7;
- Decrement(Number_Of_Times);
- Writeln;
- Number_Of_Times := 7;
- Write_A_Line(Number_Of_Times);
- end. (* of main program *)
-
-
-
-
- { Result of execution
-
- The value of the count is now 6
- The value of the count is now 5
- The value of the count is now 4
- The value of the count is now 3
- The value of the count is now 2
- The value of the count is now 1
-
- The value of the count is now 7
- The value of the count is now 6
- The value of the count is now 5
- The value of the count is now 4
- The value of the count is now 3
- The value of the count is now 2
- The value of the count is now 1
-
- }