Go4Expert - String problem

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- - String problem (http://www.go4expert.com/showthread.php?t=13255)

Hi all,
I want remove tail end whitespace from string in c.for example- i/p string is "today is monday "and o/p string is "today is monday"
plz help asap.
thanks in advance....

Re: String problem

It's not difficult. Where are you stuck?
Generally the algorithm for this would be:
find the last character in the string
if it's a space, replace it with \0
repeat until the last character in the string isn't a space.

Re: String problem

See the following Example C program to remove the training space.

Code:

#include<stdio.h>

#include<string.h>



main()

{

        char string[]="welcome to go4Expert            ";



        int len=strlen(string);    // find the length of the string

        printf("%s",string);

        printf("=======\n");  //indicator.

        int c;

        int i=0;

        len=len-1;

        while(isspace((c=string[len])))  // read the string from end up to find a character.

        {

                len--;

        }

        string[len]='\0';  // insert the null character after found the alpha character

        printf("%s",string);

        printf("=======\n");



}

Output:

Code:

welcome to go4Expert            =======

welcome to go4Exper=======

in first line the indicator prints after some space. in second line the indicator prints near the string.

Re: String problem

i have written 3 general functions regarding trims

check this

Code:

#include <stdio.h>

#include <string.h>

#include <malloc.h>





void trimLeft(char [],char);

void trimRight(char [],char);

void trim(char[],char);



void trimRight(char string[],char what){//what=the char to remove

    int len= strlen(string)-1;

    while (string[len-1]==what){

         len--;

     }

     string[len]= '\0';

}

void trimLeft(char string[],char what){

    int i=0,len=0,len1=0,size=0;

    len=strlen(string);

     while (string[len1]==what){

         len1++;

     }

     size=len-len1;

     char * rest=NULL;

     if (len1>0){

            rest=(char *)malloc((size+1)*sizeof(char));

          for (i=len1;i<len;i++){

                rest[i-len1]=string[i];

          }

          rest[size]='\0';

          strcpy(string,rest);

    }

}





void trim(char string[],char what){

   trimRight(string,what);

   trimLeft(string,what);

}



int main(){

char test1[]="+++++++++++++++test1+++++++++++++++";

printf("\nbefore trimRight:<%s>",test1);

trimRight(test1,'+');

printf("\nafter trimRight:<%s>",test1);

printf("\n");



char test2[]="@@@@@@@@@@@@test2------------";

printf("\nbefore trimLeft:<%s>",test2);

trimLeft(test2,'@');

printf("\nafter trimLeft:<%s>",test2);

printf("\n");



char test3[]="--------------test3------------";

printf("\nbefore trim:<%s>",test3);

trim(test3,'-');

printf("\nafter trim:<%s>",test3);

printf("\n");

getchar();

return 0;

}

Re: String problem

Hope this is a better way

Code:

#include<stdio.h>

#include<string.h>

#include<malloc.h>

main()

{

        char *str ;

        char string[]="welcome to go4Expert     ";



        int len=strlen(string);    // find the length of the string

        printf("%s",string);

        printf("=======\n");  //indicator.

        int c;

        int i=0;

        len--;

                str = string ;

                str+=len ;

        while (isspace((*str--)));

        *(str+2)='\0';  // insert a null character



        printf("%s",string);

        printf("=======\n");



}

Re: String problem

See the following Example C program to remove the training space.

Code:

Code:

#include<stdio.h>

#include<string.h>



main()

{

        char string[]="welcome to go4Expert            ";



        int len=strlen(string);    // find the length of the string

        printf("%s",string);

        printf("=======\n");  //indicator.

        int c;

        int i=0;

        len=len-1;

        while(isspace((c=string[len])))  // read the string from end up to find a character.

        {

                len--;

        }

         string[len+1]='\0';  // insert the null character after found the alpha character

        printf("%s",string);

        printf("=======\n");



}

Output:
Code:

Code:

welcome to go4Expert                =======

welcome to go4Expert=======

in first line the indicator prints after some space. in second line the indicator prints near the string.

Note: Last post for This node I did a mistake in coding. Now I correct it and I highlight that in code.