This is one way of doing it without index.
> #include <stdio.h>
> #include <string.h>
>
> void reverse(char *begin, char *end)
> {
> char temp;
>
> while ( begin <= end )
> {
> temp = *begin;
> *begin = *end;
> *end = temp;
> begin++;
> end--;
> }
> }
>
> int main()
> {
> char str[100];
>
> scanf ("%s", str);
>
> reverse(str, str + strlen(str) - 1);
>
> printf ("Reversed String = %s\n", str);
>
> return 0;
> }
>
>
> On Tue, May 31, 2011 at 12:14 PM, Supraja Jayakumar <
suprajasank...@gmail.com> wrote:
> Hi
>
> Pls see below. This is only with indexing. I am not sure how to do it w/o
> indexing if its not a C-style string or w/o pointer arithmetic.
> Pls let me know if there is such a technique. I would be very eager to
> know.
> Thanks.
>
> #include<stdio.h>
> #include<string.h>
>
> void reverse(char s[]) {
>
> int len = sizeof(s)/sizeof(char);
> printf("%d\n", len);
> if(len == 1 || len == 0)
> return;
> int i,j;
> for(i = 0, j = len-1; i < len, j >= 0; i++, j--) {
> if(i >=j)
> break;
> char temp = s[i];
> s[i] = s[j];
> s[j] = temp;
> printf("%c%c\n", s[i], s[j]);
> }
> }
>
> int main() {
> char s[7] = {'a','b','x','c', 'l', 'm', 'y'};
> reverse(s);
> int i;
> for(i = 0; i < 7; i++)
> printf("%c", s[i]);
> return 0;
>
> }
>
>
> On Tue, May 31, 2011 at 12:04 PM, nagajyothi gunti <
> nagajyothi.gu...@gmail.com> wrote:
>
>> Hope this logic looks better.
>> class Program
>> {
>> static void Main(string[] args)
>> {
>> string str = "string";
>> char[] char_str=str.ToCharArray();
>> char temp;
>> int string_length = char_str.Length;
>> int mid = string_length / 2;
>> int j=0;
>> for(int i=0;i<mid;i++){
>> j = str.Length-1-i;
>> temp = char_str[i];
>> char_str[i] = char_str[j];
>> char_str[j] = temp;
>> }
>>
>> Console.Write(char_str.ToString());
>>
>> Console.Read();
>>
>> }
>> }
>>
>> On Sat, May 28, 2011 at 7:53 AM, <adityasir...@gmail.com> wrote:
>>
>>> In java you can do this, take O(n) time. Is that correct?
>>>
>>> -Adi
>>>
>>> public class ReverseString {
>>>
>>> public static void main(String[] args){
>>> String name = "Aditya";
>>> String reverse = "";
>>> for(int i=0;i<name.length();i++){
>>>
>>> System.out.println(name.charAt(i) + reverse);
>>> reverse = name.charAt(i) + reverse;
>>> }
>>> }
>>> }
>>>
>>>
>>> On Sat, May 28, 2011 at 6:40 AM, abc abc <may.i.answ...@gmail.com>wrote:
>>>
>>>> *Given an array of characters. How would you reverse it. ? How would
>>>> you reverse it without using indexing in the array.*
>>>> *
>>>> *
>>>>
>>>> --
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>>>>
>>>
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>>
>>
>>
>> --
>> Jyothi
>>
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>>
>
>
>
> --
> U
>
> --
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>
--
-Aakash Johari
(IIIT Allahabad)
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