#include<stdio.h>
#include<string.h>


int main()
{
  int n,i=0;
  char s[]="   HELLO THERE    ";
  printf("Before trim:%s\n",s);
  for(n=strlen(s)-1; n>=0; n--)
   if(s[n]!=' ' && s[n]!='\t' && s[n]!='\n') break;
  s[n+1]='\0';
  while(isspace(s[i++]));
  i=0;
  while(s[i]!='\0') s[i++];
  s[i]='\0';
  printf("After trim:%s\n",s);
  return n;
}