Pascal - Passing Arrays as Subprogram Arguments

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Category: Chapter 3

Published: Sunday, 14 April 2013 16:28

Written by Sternas Stefanos

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Pascal allows passing arrays as subprogram parameters. Following function will take an array as an argument and return average of the numbers passed through the array as follows:

program arrayToFunction;
const
   size =5;
type
   a = array [1..size] of integer;
var
   balance:  a =(1000,2,3,17,50);
   average: real;  
function avg(var arr: a): real;
var
   i :1..size;
   sum: integer;
begin
   sum :=0;
   for i :=1 to size do
      sum := sum + arr[i];
   avg := sum / size;
end;
begin  
   (*  Passing the array to the function  *)
   average := avg( balance );
   (* output the returned value *)
   writeln('Average value is: ', average:7:2);
end.
 

When the above code is compiled and executed, it produces following result:

Average value is: 214.40