Electrofriends

To reverse the given string using pointer

by Ranjith | December 4th, 2008.

This is the program to reverse the given string and display. The program internally uses the logic of reversing the word.

Logic: The approach here is to reverse the string using the pointers. Reversing the string includes the reversing the each and every words in it. After accepting a string from user, it calls a function “strev” with two string pointer arguments, the source and destination. It has an iterative loop, which traces from the EOL through the beginning. Each time it copies the current letter to the destination. Finally it displays the resultant string.

The earlier program implements the same by direct method, i.e. without pointers.

#include<stdio.h>
#include<conio.h>
void strev(char *str1, char *str2);
void main()
{
        char *str1, *str2;
        clrscr();
        printf("\n\n\t ENTER A STRING...: ");
        gets(str1);
        strev(str1,str2);
        printf("\n\t THE REVERSED STRING IS...: ");
        puts(str2);
        getch();
}

void strev(char *str1, char *str2)
{
        int i = 0, len = 0, r = 0;
        while(*(str1+len)!='\0')
                len++;
        for(i=len-1; i>=0; i--)
        {
                *(str2+r) = *(str1+i);
                r++;
        }
        *(str2+r) = '\0';
}

Share and Enjoy:
  • Digg
  • Technorati
  • StumbleUpon
  • TwitThis
  • del.icio.us
  • Facebook
  • Google Bookmarks
  • Reddit
  • Mixx
  • Yahoo! Buzz
  • LinkedIn
  • MySpace
  • FriendFeed
  • NewsVine
  • Netvibes
Similar Posts:

1 Response to To reverse the given string using pointer

  1. kamal

    i need codes for yours projects
    so please send me full details
    don’t forget me
    thank uuuuuuuuuuuuuuuuuuuuu

Leave a Reply

Copyright©2009 www.electrofriends.com All Rights Reserved. Powered by Dhyeya