A computer has been around for us for a long period of time.
We use computers is a wide range of applications such as in business, industry,
education, entertainment, weather forecasting, military for example. It makes our lives easier because most of the
tedious task and difficult task is being done by the computer with the use of a
computer program. As a programmer our work is very crucial and critical most of
the time because we are dealing with important facts and figures all the time
one small mistake it can cause tremendous amount of losses on the part of the
company or even in an organization we are working with.
Computers at first is designed to perform computations
during world war 2 but later years it has been used to manipulate other types
of date such as words, sentences, phrase or even paragraphs. In this article I
will explain and discuss in detailed one of the most basic string applications
written in C++ programming language a program called Palindrome Checker. C++ is
one of the most versatile programming language derive from the C language that
is introduced in 1972 by Dr. Dennis Ritchie later one as the complexity in
software development particularly in system programming. C++ is being developed
by Dr. Bjarne Stroustrup to overcome some of the weak point of the C language
in 1981 at AT and T laboratories in New Jersey.
The enhancement of C++ library it gives the language more suitable
application not only limited in system programming. When we talking about
system programming we are referring to writing programs that interacts to the
computer hardware such examples is operating systems, compilers and
interpreters, antivirus software and system tools to maintain the normal
operation of our computers.
So the question is what is a palindrome well a palindrome it
refers to word, sentences, phrases, numbers or string when we read it forward
and backward the spelling and pronunciation is the same. Example of words that
is palindrome by nature is ana, radar, ama, abba to name a few. In this article in writing our C++ program I
will be using CodeBlock text editor and Dev C++ that is already integrated in
our CodeBlocks editor. This two software
is open source it means it is free to use and download over the Internet for
your own personal use and commercial use also. You can download CodeBlock in their web
address http://www.codeblocks.org/ .
Let us presuming you have already downloaded and installed
codeblocks in your computer. The first step is to open our editor and encode
the C++ commands. In this program we declare to library file in C++ that
standard iostream and string.h. The iostream is one of the very basic library
file we use every time we write the C++ program it tells our compiler that we
are allowed to use basic input and output commands in C++ such for example cout
and cin commands. The next library file that I will discuss is the string.h
this library file in C++ is used primarily to include string functions in our
program in this program we use the strcpy, strcmpi and strrev functions. The
strcpy is a function that will copy the first and second string variable in our program. The second
strcpy command will copy the variable word3 that will act as your temporary
folder of a string and we use the strrev
this function will reverse the first string variable in our program. The next
part is the use of the check_same_string
= strcmpi(word1,word3); this command tells use the check_same_string is our
assignment operator that will hold the compared string of word1 and word3
variables. In our condition in our
program if (check_same_string == 0) it
means that is the both string word1 and word3 are the same they are considered
as palindrome if not the word is not a palindrome. Below is the complete
program listing of our palindrome checker program.
If you have some questions please send me an email at jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Sample Program Output
#include <iostream>
#include <string.h>
using namespace
std;
char word1[50],word2[50],word3[50];
int check_same_string=0;
main()
{
system("cls");
cout <<
"\n\n";
cout <<
" ***====Palindrome Checker
====***";
cout <<
"\n\n";
cout <<
"Enter a Word Please : ";
gets(word1);
strcpy(word2,word1);
strcpy(word3,strrev(word2));
check_same_string = strcmpi(word1,word3);
if
(check_same_string == 0)
{
cout
<< "\n\n";
cout
<< "The word in reversed order is " << word3 <<
". \n";
cout
<< "It is a Palindrome.";
}
else {
cout
<< "\n\n";
cout
<< "The word in reversed order is " << word3 <<
".\n";
cout <<
"It is Not a Palindrome.";
}
cout
<< "\n\n\n";
cout
<< "\t Thank You For Using
This Program";
cout
<< "\n\n";
system("pause");
}
