Question

Write a program that reads each word from A1.txt and check if it's a palindrome or not. Show your output in the file Bl.txt. The total number of words in the file can change. You must use c-string or character arrays. Using String datatype and strrev() function are not allowed in this problem. "A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward or forward." (Wikipedia) Sample Input: series madam Sample Output: yes

Answer 1

// header file for basic input output
#include <iostream>
// header file for string manupulation
#include <string.h>
// header file for file manipulation
#include <bits/stdc++.h>

using namespace std;

int main(){
// variable for word
char arraystr[100];
int length,i;
fstream file,file1;
// opening file in read mode
file.open("A1.txt",ios::in);
// checking wheather file exist or not
if(!file)
{
cout<<"Error in opening file!!!";
return 0;
}
// opening file i write mode
file1.open("B1.txt",ios::out);
// checking wheather file is created or not
if(!file1)
{
cout<<"Error in creating file!!!";
return 0;
}
// reading word from the file in arraystr variable
while(file>>arraystr)
{   
// variable to check the palindrome word
int flag = 0;
// finding the length of the word recorded
length = strlen(arraystr);
// loop to check whether string is pallindrome or not
for(i=0;i< length;i++){
if(arraystr[i] != arraystr[length-i-1]){
flag = 1;
break;
}
}
// checking the flag value for palindrome word and writing the output in B1.txt file
if(flag)
file1 << "No\n";
else
file1 << "Yes\n";
}
// closing the files
file.close();
file1.close();
return 0;
}

root@kali:-/Desktop/codes/temp# ls A1.txt palindrome.cpp root@kali:-/Desktop/codes/temp# cat A1.txt series madamroot@kali:-/Desktop/codes/temp# g++ palindrome.cpp -o palindrome, root@kali:-/Desktop/codes/temp# ./palindrome rootakali:-/Desktop/codes/temp# ls Al.txt B1.txt palindrome palindrome.cpp root@kali:-/Desktop/codes/temp# cat B1.txt No Yes root@kali:-/Desktop/codes/temp#

In the output I have show that, at first there are just two file exists A1.txt and palindrome.txt and the content of A1.txt is series and madam. After executing the program, a new file B1.txt is creating other than palindrome binary file and content of that file is No Yes as shown in the sample code.