need ur urgent help

[smartabhi]

how to find the number of words present in a string which may contain more than 1 blanks between two words and may have leading or tailing blanks.

example:--- my name is abhishek sharma .

[dtimes6]

You can use something called flex.

[Ganon11]

Consider the following code:

#include<iostream>
#include<string>
using namespace std;
 
void extractFirstWord(string& sentence, string& word);
void processBlanks(string& sentence);
 
int main() {
    string sentence, word; //definition of variables
    cout << "Input a sentence: ";
    getline(cin, sentence); //sentence is initialized to the user input
 
    while (sentence != "") { // while sentence still contains characters
          processBlanks(sentence); // removes blanks in front of the next word
          if (sentence.length() > 0) { //removing blanks may set sentence to "" - must check if sentence has a word to be extracted
             extractFirstWord(sentence, word); // word is set to the first word in sentence - sentence is shortened, beginning just after word
             cout << word << endl; // prints the word - here, you can replace the cout with whatever processes you need, such as a sum counter
          }
    }
 
    system("PAUSE");
    return 0;
}
 
void extractFirstWord(string& sentence, string& word) {
     int pos = sentence.find(' '); // find the next occurance of a space
     if (pos != string::npos) { // if the string has spaces remaining
        word = sentence.substr(0, pos); // word is set to the string from position 0 in sentence to the position of the space
        sentence = sentence.substr(pos); // sentence is shortened - it now equals everything after word in the original sentence
     } else { // if the string has no spaces - a.k.a., the only thing left in sentence is the last word
        word = sentence; // word is set to sentence
        sentence = ""; // sentence is cleared
     }
     return;
}
 
void processBlanks(string& sentence) {
 
     while (sentence.length() > 0 && sentence.substr(0, 1) == " ") // Removes blanks - while the first character is a blank, remove that character
           sentence = sentence.substr(1);
     return;
}
 
/* Sample Run
 
Input a sentence:    Only  when     I used     weird things  such as  messed  up
 spaces  did     this work!
Only
when
I
used
weird
things
such
as
messed
up
spaces
did
this
work!
Press any key to continue . . .
 
Input a sentence:      Does   fuzzy logic   tickle?    When you  choke a smurf,
what   color  does it turn?
Does
fuzzy
logic
tickle?
When
you
choke
a
smurf,
what
color
does
it
turn?
Press any key to continue . . .
 
*/

Will this work?

In Java, there was a class called stringTokenizer that would take a string in its constructor and seperate it by a character you specified (default was space). This class would solve your problem - unfortunately, no such class exists in the C++ standard library. Thus, I created one! Please PM me if you'd like a copy of the class.