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public class palindrome {

   public static void main(String args[]) {
     String name="caac";
     char com[]=name.toCharArray();

     char[] con=new char[4];
     for(int i=0,j=3;i<com.length;i++,j--)
     {

         com[j]=con[i];
         System.out.println(i+" "+j+"value of i "+con[i]);

     }

   }
}

i want to copy char com to char c in reverse, i got blank output, whats wrong with this program.what correction should i made.this question body does not meet our quality that line i dont want to see stackoverflow.


small correction to existing code on the line

 con[j] = com[i];

and

 System.out.println(i + " " + j + "value of i " + com[i] +" "+con[j]);

works well.

 public static void main(String args[]) {
        String name = "daac";
        char com[] = name.toCharArray();

        char[] con = new char[4];
        for (int i = 0, j = 3; i < com.length; i++, j--) {
            con[j] = com[i];
            System.out.println(i + " " + j + "value of i " + com[i] +" "+con[j]);

        }

    }

Other solution is to use StringBuffer.reverse for the string

  StringBuffer sb = new StringBuffer(name);
  char reverse[] = sb.reverse().toString().toCharArray();

copying char to char array reverse, i want to copy char com to char c in reverse, i got blank output, whats wrong with this program.what correction should i made.this question body does not meet our​  A way to do this is to copy the contents of the string to char array. This can be done with the help of c_str () and strcpy () function. The c_str () function is used to return a pointer to an array that contains a null terminated sequence of character representing the current value of the string.


Looks like com, con and i and j are mixed up. I'd highly recommend avoiding i and j together, even if textbooks do it. Use i and k instead, or better still something that is representive of what the variable purpose, also com and con confusingly similar.

If you change to this:

con[j] = com[i];
System.out.println(i + " " + j + " value of i " + com[i] + " " + con[j]);

Shows this output, is this what you expected?

0 3 value of i c c
1 2 value of i a a
2 1 value of i a a
3 0 value of i c c

There is no harm or performance hit in using longer more descriptive variables, this makes it more obvious where problems are. e.g.

char original[] = name.toCharArray();

char[] reversed = new char[4];
for (int forwards = 0, backwards = 3; forwards < original.length; forwards++, backwards--) {

    reversed[backwards] = original[forwards];
    System.out.println(
            forwards + " " + backwards + " value of i " + original[forwards] + " " + reversed[backwards]);

}

Reverse a word in the char array, Memory management. Right now, your code leaks memory--every time you call reverse , it allocates some memory, and none of your other  i want to copy char com to char c in reverse, i got blank output, whats wrong with this program.what correction should i made.this question body does not meet our quality that line i dont want to see stackoverflow.


I think you could make your much smaller then what you want.If you want to reverse the char[] which is created from a string you could first reverse the string and then you could create the array.

String name="caac";
String reverse= new StringBuffer(name).reverse().toString();
  char com[]=name.toCharArray();//which contains reversed array

Copy char array in reverse to another char array, I've been trying to do this Palindrome program without succes It basically copy an string array backwards to another array and check if both  Here, buffer is copying to ival by using assignment (=) operator and cast typing to (unsigned int*) - it will read 4 bytes (size of unsigned int) from buffer base index and assignment operator will assign it into ival. Example to copy integer value to character buffer and vice versa in C


One more method to reverse char array:

public char[] reverseArray(char[] source) {
    char[] reversed = new char[source.length];
    IntStream.range(0, source.length).forEach(i -> reversed[source.length - 1 -i] = source[i]);
    return reversed;
}

Different methods to reverse a string in C/C++, create a dynamic pointer char array. char *rev = new char [n+1];. // copy of string to ptr array. strcpy (rev, str);. // Swap character starting from two. // corners. Java tutorial to copy character array to string. Here, we will discuss about the various methods of copying a character array to a string using. If you have any doubts leave a comment here at the end of the post. Creating a string object based on the character array. Adding character by character to an initially empty string.


Simon Asir. I recommend you write a function, an example is given below demonstrate it, i didn't understand what problem(task) you are solving:

public static void main(String[] args){
    String name="something eatable";
    char com[]=name.toCharArray();
    char[] reversed = reverseArray(com);
      for (char c:reversed)
          System.out.print(c+" ");
    System.out.println(isPalindrome(new char[]{'b','a'}));
    System.out.println(isPalindrome(new char[]{'a','b','a'}));
}
public static char[] reverseArray(char[] arr){
    char[] reversed = new char[arr.length];
    for (int i=0, j=arr.length-1; i < arr.length; i++, j--){
        reversed[i]=arr[j];
    }
    return reversed;
}
public static boolean isPalindrome(char[] arr){
    for (int head=0, tail=arr.length-1; head<=tail; head++, tail--){
        if (arr[head]!=arr[tail])
            return false;
    }
    return true;
}

Reverse A String In C# With And Without An Inbuilt Function, This blog explains how to reverse a string in C# using an inbuilt Reverse Method; char[] charArray = stringInput. It starts assigning characters one by one from the last index of the character to a reversestring variable. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. Reverse a word in the char array. Ask Question copy and paste this


Reverse a string in place. : char array « Data Types « C++ Tutorial, Reverse a string in place. : char array « Data Types « C++ Tutorial. Copying a string using pointer notation. 2.20.10. Initializing char pointers with strings. First take the pointer to end and count how many characters r there in a string. Then start copying from last location of first array tto first location of second array. If u r using pointers Then increment second pointer n decrement first pointer.


C# ToCharArray: Convert String to Array, We copy a string to a char array with 2 versions of C# code. Version 1: This uses ToCharArray. We make sure the resulting string has a correct first character each​  Input array, specified as a numeric array, a character array, a cell array of character arrays, a categorical array, or a string array. If A is a numeric array, then char converts numbers into characters.


String.ToCharArray Method (System), Copies the characters in this instance to a Unicode character array. public: cli::​array <char> ^ ToCharArray();. C# Copy. Program to copy the contents of one array into another in the reverse order Given an array , the task is to copy these array elements into another array in reverse array. Examples: