CareerCup

public class CountWords {

	public static void main(String[] args) {
		String str = "  an b  c   d";
		//String str = " c        d";
		System.out.println("String: " + str);
		System.out.println("Word Count: " + countWords(str));
	}
	
	public static int countWords(String string) {
		if (null == string) { return -1; }
		
		int count = 0;
		int len = string.length();
			
		char lastChar = string.charAt(0);
		for (int i=0; i<len; i++) {
			if (string.charAt(i) == ' ' && lastChar != ' ') {
				++count;
				lastChar = ' ';
			}
			lastChar = string.charAt(i);
		}
		if (lastChar != ' ') {
			++count;
		}
		return count;
	}
}

If previous one is a 'space' and current character is not a space then increase the word count.

#include <stdio.h>

int countWords (char *str) {
  int index = 0 ;
  char lchar = ' ', cur ;
  int count = 0 ;

  if ( str == NULL )
    return 0 ;
  while (str[index] != '\0') {
    if (str[index] != ' ' && lchar == ' ')
      count ++ ;
    lchar = str[index++] ;
  }
  return count ;
}

int main () {
  char *str = "a " ;
  printf ( "\nCount words = %d\n", countWords (str) ) ;
  return 0 ;
}

public class CountWordInSentence {

public static void main(String args[])
{
String sentence="Hello World is beautiful ";
int count= countWords(sentence);
count=count+1;
System.out.println("Total words: "+count);
}

private static int countWords(String sentence) {
int wordCount=0;
for(int i=0;i<sentence.length();i++)
{
if(i==sentence.length()-1 &&(sentence.charAt(i)==' ' ))
{
System.out.println("found space at: "+i);
break;
//wordCount++;
}
else if(sentence.charAt(i)==' ' && sentence.charAt(i+1)!=' ')
{
System.out.println("found space at: "+i);
wordCount++;
}
}
return wordCount;
}

}

public class CountWordInSentence {

public static void main(String args[]){
String sentence1=" Hello World is beautiful ";
String sentence="Hello ";
System.out.println(sentence+"\nTotal words: "+countWords(sentence));
}

private static int countWords(String sentence) {
int wordCount=0;
if (sentence == null) return wordCount;
for(int i=1;i<sentence.length();i++){
if(sentence.charAt(i-1) == ' ' && sentence.charAt(i) != ' ')
wordCount++;
}
if(sentence.charAt(0)!= ' ') wordCount++;
return wordCount;
}

}

class countwords{
string m_str;
void trim()
{
size_t len = m_str.length();
if(len != 0)
{
size_t count= 0;
size_t b = m_str.find_first_of(" "), e = m_str.find_last_of(" ");
while( (b= m_str.find_first_of(" ",b)) == 0)
m_str = m_str.substr(b+1,len);
len = m_str.length();
while( (e= m_str.find_last_of(" ",e)) == len-1){
m_str = m_str.substr(0,e);
len =m_str.length();

}

}
}
public :
countwords(string &str)
{
m_str = str;
}
countwords()
{

}
int count(){
trim();
size_t br =0;
int count =0;
while((br = m_str.find(" ",br))!= string::npos)
{
count++;
br++;
while(m_str[br] == ' ')
br++;

}
return count+1;
}
};

void main()
{
string str(" abcd efgh ijkl ");
countwords cn(str);
std::cout<<cn.count();
getchar();
}

#include <iostream>
#include <string>

using namespace std;

int count(string a)
{
int n = 0;
for(int i = 1; i <= a.length(); i++)
{
if(i == a.length() || a[i] == ' ') {
if(a[i - 1] != ' ') n++;
}
}
return n;
}

int main()
{
cout << count("a b cc ccccc") << endl;
cout << count("a") << endl;
cout << count("") << endl;
}

public static int wordCount(String s){
return s.trim().split("\\s+").length;
}

private static int wordCount(String s) {

        int i = 0, wordCount = 0;
        boolean inSpace = true;
        while(i < s.length()) {
            char c = s.charAt(i);
            boolean isBlank = c == ' ';
            if(inSpace && isBlank) {
                // do nothing, still in space
            } else if(inSpace && !isBlank) {
                wordCount++; // got a new word! wohoo!
                inSpace = false;
            } else if(!inSpace && !isBlank) {
                // mid word, do nothing.
            } else if(!inSpace && isBlank){
                // oh snap, end of word! into space I go!
                inSpace = true;
            }
            i++;
        }
        return wordCount;
    }

public static void main (String args[]){
int i = count (" adfasdf asidfa asdfa sa as");
System.out.println(i);
}

public static int count (String s){
int count = 0;
boolean inWord = false;
boolean inSpace = true;
for (int i = 0 ; i< s.length (); i++){
if (s.charAt(i) == ' '){
if (inWord){
//count ++;
inWord = false;
}

inSpace = true;

} else {
if (inSpace){
count ++;
inSpace = false;
}
inWord = true;

}

}
return count;

}

int CountWordsIn_A_Sentence(char * sentence)
{
    int c = 0;
    int p = 0;
    bool w = false;
    if(sentence == NULL)
        return -1;

    while(true)
    {
        if(sentence[p] == '\0')
            break;
        if(sentence[p] == ' ')
        {
            w = false;
        }
        else
        {
            if(!w)
                c++;
            w = true;
        }
        p++;
    }
    return c;
}

public static int countWord(String str)
    {
	int cursor =0;
	int count =0;
	boolean word = false;
	
	while (cursor < str.length())
	{
	    char ch = str.charAt(cursor);
	    
	    if (ch==' ')
	    {
		if (word == true)
		{
		    count++;
		}
		word = false;
		cursor++;
	    }
	    else
	    {
		word = true;
		cursor++;
	    }
	}

	if (word== true)
	{
	    count++;
	}
	
	return count;
    }

public static int WordCount(String str)
        {
            if(str == null) {return 0;}
            str = str.Trim();
            int wordCount = 0, index =0;
            while (index < str.Length)
            {
                // check if the current character is part of a word
                while (index < str.Length && !char.IsWhiteSpace(str[index]))
                {
                    index++;
                }
                
                wordCount++;
                
                // skip whitespace until next word
                while (index < str.Length && char.IsWhiteSpace(str[index]))
                {
                    index++;
                }
            }
            return wordCount;
        }