Assignment 9 Practical Arrays (Chapter 8)

Specification of program

This program may be used to explore the array structure and the ListBox component. The ListBox is used to present the values stored in an array. You are required to code the event handlers for the initialize array and the display array. A constant is used to allow for easy manipulation of the array. The arrays are declared as follows:

 

private

{ Private declarations }

const

nItems = 5;

var

nBasicsIntArray : array [0..(nItems-1)] of integer;

nBasicsStrArray : array [0..(nItems-1)] of string;

public

{ Public declarations }

end;

 

The following code is used in the OnShow of the form:

procedure Tfrm2016Assignment9.FormShow(Sender: TObject);

//as an alternative, you may experiment with TDateTimePicker

var

dDateTime : TDateTime;

begin

//set the date to the current date and time

dDateTime := Date() + Time();

edtDateTime.Text := DateTimeToStr(dDateTime);

edtDateTime.ReadOnly := TRUE;

end;

 

The following EXAMPLE code is used to assign user values to the array:

procedure Tfrm2016Assignment9.btnAssignIntArrayClick(Sender: TObject);

var

iCount : Integer;

sString : String;

begin

for iCount := 0 to (nItems-1) do

begin

sString := InputBox('Please input an integer value', 'Value ' + IntToStr(iCount), '0');

nBasicsIntArray[iCount] := StrToInt(sString);

end;

end; INF1511/201

39

 

Program structure – Initialize integer array, display double and display array.

Example of required output

This UI below presents the following (required) sequence of operations:

ï‚· Initialize STRING array to zero values.

ï‚· Assign STRING array. Values are assigned using the InputBox to gain user values.

ï‚· Display array.

ï‚· Convert strings to capital letters..

ï‚· Display array.

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H-----------ell-----------o S-----------ir/-----------Mad-----------am ----------- Th-----------ank----------- yo-----------u f-----------or -----------you-----------r i-----------nte-----------res-----------t a-----------nd -----------buy-----------ing----------- my----------- po-----------ste-----------d s-----------olu-----------tio-----------n. -----------Ple-----------ase----------- pi-----------ng -----------me -----------on -----------cha-----------t I----------- am----------- on-----------lin-----------e o-----------r i-----------nbo-----------x m-----------e a----------- me-----------ssa-----------ge -----------I w-----------ill----------- be----------- qu-----------ick-----------ly -----------onl-----------ine----------- an-----------d g-----------ive----------- yo-----------u e-----------xac-----------t f-----------ile----------- an-----------d t-----------he -----------sam-----------e f-----------ile----------- is----------- al-----------so -----------sen-----------t t-----------o y-----------our----------- em-----------ail----------- th-----------at -----------is -----------reg-----------ist-----------ere-----------d o-----------n -----------THI-----------S W-----------EBS-----------ITE-----------. ----------- Th-----------ank----------- yo-----------u -----------

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