How to resolve the algorithm Substring step by step in the Delphi programming language

Published on 12 May 2024 09:40 PM
#Delphi

How to resolve the algorithm Substring step by step in the Delphi programming language

Table of Contents

Problem Statement

Display a substring:

If the program uses UTF-8 or UTF-16,   it must work on any valid Unicode code point, whether in the   Basic Multilingual Plane   or above it. The program must reference logical characters (code points),   not 8-bit code units for UTF-8 or 16-bit code units for UTF-16. Programs for other encodings (such as 8-bit ASCII, or EUC-JP) are not required to handle all Unicode characters.

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Step by Step solution about How to resolve the algorithm Substring step by step in the Delphi programming language

Source code in the delphi programming language

program ShowSubstring;

{$APPTYPE CONSOLE}

uses SysUtils;

const
  s = '0123456789';
  n = 3;
  m = 4;
  c = '2';
  sub = '456';
begin
  Writeln(Copy(s, n, m));             // starting from n characters in and of m length;
  Writeln(Copy(s, n, Length(s)));     // starting from n characters in, up to the end of the string;
  Writeln(Copy(s, 1, Length(s) - 1)); // whole string minus last character;
  Writeln(Copy(s, Pos(c, s), m));     // starting from a known character within the string and of m length;
  Writeln(Copy(s, Pos(sub, s), m));   // starting from a known substring within the string and of m length.
end.

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