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More Occam's Razor C to Java Translator Theory of Morality II


A string class Free Stuff

Abstract

This article presents my first attempt at a C++ string class.

1. Overview

I learnt how program in C with an experience programming in Basic, and so I was both impressed and appalled by C's string handling. Impressed by its efficiency, but appalled by the amount of work required on the programmer's behalf to keep track of memory. Then I learnt Java and Lisp and was impressed how the burden of string memory management had been lifted from the programmer.


When I read C++ creator Bjarne Stroustrup's account of a string class in page 251 of his book The C++ Programming Language, second Edition, I was excited with the possibility that strings could be both easy to use and efficient in implementation. My String class is based on his example, with one extension: the ability to efficiently append text onto an existing string.


Consider the following Java program as an example of the ease of string manipulation:

class Test
{
   int a = {1,2,3,4,5,6,7,8,9,10};
   
   String compose_string()
   {
      String s = "";
      for (int i=0; i<a.length; i++)
      {
         s = s + a[i]; 
      } 
      return s; 
   } 

   public static void main(String args)
   {
      System.out.println(compose_string());
   }
}

To show how my own string class can be used, here is the same example in C++ using my class:

#include "output.hh"

int A_SIZE = 10;
int a[A_SIZE] = {1,2,3,4,5,6,7,8,9,10};

String compose_string()
{
   String s = "";
   for (int i=0; i<A_SIZE; i++)
   {
      s << a[i];
   }
   return s;
}

int main(int argc, char** argv)
{
   cout << compose_string() << endl;
}

2. A Technical Note

I have avoided using C++'s I/O (Input/Output) classes, as part of my investigations was into the design of I/O classes in general. Instead I have written my own ones that are based on the C++ ones. My classes are built upon the relevant C classes.

3. The Sources

  • String class
  • Interface file:
output.hh
  • Implementation file:
output.cc
  • Global header file:
   gccprefs.hh
  • Some tester code:
   t-output.cc
  • The complete archive:
   string1.tar.gz


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| Main Menu | Research Projects | Photo Album | Curriculum Vitae | The Greatest Artists |
| Email Address | Computer Games | Web Design | Java Training Wheels | The Fly (A Story) |
| Political Activism | Bob Dylan Quotes+ | My Life Story | Smoking Cessation | Other Links |
| Debugging Macros | String Class I | Linked List System I | Java for C Programmers | Naming Convention |
| String Class II | How I use m4 | Strings III | Symmetrical I/O | Linked Lists II |
| Run-Time Type Info | Virtual Methods | An Array System | Science & Religion | Submodes |
| Nested Packages | Memory Leaks | Garbage Collection | Internet & Poverty | What is Knowledge? |
| Limits of Evolution | Emacs Additions | Function Plotter | Romantic Love | The Next Big Thing |
| Science Fiction | Faster Compilation | Theory of Morality | Elisp Scoping | Elisp Advice |
| S.O.G.M. Pattern | Safe Properties | School Bullying | Charisma Control | Life and Death |
| Splitting Java | Multiple Ctors | Religious Beliefs | Conversation 1 | Conversation 2 |
| J.T.W. Language | Emacs Additions II | Build Counter | Relation Plotter | Lisp++ Language |
| Memory Leaks II | Super Constructors | CRUD Implementation | Order a Website Form | There Is An Afterlife |
| More Occam's Razor | C to Java Translator | Theory of Morality II
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