Stringreverse in place

INPUT        : Welcome to India

OUTPUT     : emocleW ot aidnI.

          POSTER      :VILAS

 solutions :

by MANI

#include

void stringreverse( char * ptr)

{

      int i=0,k,j=0;

      char * a =ptr; // storing the starting address of the string;

      while(*ptr!=NULL)// traversing till end of string

      {

           

            while((*ptr)!=32&&(*ptr!=NULL)) // condition for blank space and NULL

            {

                  ++i;  // having a refernce for counting the character length

                  ++ptr;// moving the pointer  to the end of first string

            }

            --ptr;//placing pointer to the last character position ofthe string

            k=i/2;

            for(;i>k;i--,j++)  // swapping the characters of the string

            {

                 

                  char temp;

                  temp = *(ptr-j);

                  *(ptr-j) = *(ptr-(i-1));

                  *(ptr-(i-1)) = temp;

                 

            }

            i=0,j=0;               // reinitializing the variables

            ptr++;

            for(;*ptr==32;ptr++);  // moving to the next string in the sentence

           

      }

      printf("%s",a);

}

int main()

{

      char a[] = "welcome to india"; // string to be reversed

      stringreverse(a); //passing the string to the function

      return 0;

}

by SHRUTHI

#include "stdafx.h"

char * reverse(int a,int b,char src[20])

{

      char des[20]={0,};

      int i=0;

      for(;b != 0;b--,a--,i++)

            des[i]=src[a-1];

      des[i]= '\0';

      return des;

}

int _tmain(int argc, _TCHAR* argv[])

{

      char source[20],dest[20],temp[20];

      int i=0,count =0; 

      printf("ENTER THE STRING\n");

      gets(source);

      while(source[i]!='\0')

      {

            if(source[i]!=' ')

            {

i++;

                  count++;

            }

            else

            {

                  sprintf(temp,"%s",reverse(i,count,source));

                  strcat(dest,temp,i);

                  dest[i]=' ';

                  count = 0;

                  i++;

            }

}    

      dest[i]='\0';

      printf("%s",dest);

      return 0;

}

By AVINASH

#include "stdio.h"

#include "stdlib.h"

#include "string"

void myReverse(char *pSrc,char *pDest,int iWordLen);

int main()

{

       char *pBuffIn,*pBuffOut,*pTempOut,*pTempIn;

       int iCount=0,iWordLen=0;

       pBuffIn = (char *)malloc(40);

       memset(pBuffIn, '\0', 40);

       printf("ENTER:");

       fgets(pBuffIn, 40, stdin);

       pBuffOut = (char *)malloc(strlen(pBuffIn)+1);

       memset(pBuffOut, '\0', 40);

       pTempIn = pBuffIn;//Dummy variables

       pTempOut = pBuffOut;//dummy variables

      

       //For loop To track the END of the Statement

       for( iCount=0; *pBuffIn != NULL; pTempIn++,iCount++,pTempOut++)

       {

             iWordLen++;

             if(*pTempIn == 32 || *(pTempIn+1)== NULL)//Condition 2 check SPACE r NULL

             {

                   

                    myReverse(pTempIn-1, pTempOut-iWordLen+1,iWordLen-1);//-1 to pTempin and iWordlen to remove SPACE Char

                 if(*pTempIn == 32)

                           {     

                                 *pTempOut=32;   //Adding space CHAR

                                 iWordLen = 0;//initializin wordlen for next word.

                           }

                    else

                           {

                                 *pTempOut = '\0';

                                 break;

                        }

             }

       }

      

       printf("\n%s",pBuffOut);

    return 0;

}

void myReverse(char *pSrc,char *pDest, int iWordLen)

{     

      

       while((iWordLen-- != 0) && (*(pSrc+1)!= NULL))

       {

             *(pDest++) = *(pSrc--);

       }

}