494 - Kindergarten Counting Game

 

 Kindergarten Counting Game 

Everybody sit down in a circle. Ok. Listen to me carefully.

``Woooooo, you scwewy wabbit!''

Now, could someone tell me how many words I just said?

 

Input and Output

Input to your program will consist of a series of lines, each line containing multiple words (at least one). A ``word'' is defined as a consecutive sequence of letters (upper and/or lower case).

 

Your program should output a word count for each line of input. Each word count should be printed on a separate line.

 

Sample Input

 

Meep Meep!
I tot I taw a putty tat.
I did! I did! I did taw a putty tat.
Shsssssssssh ... I am hunting wabbits. Heh Heh Heh Heh ...

 

Sample Output

 

2
7
10
9

代码：

#include <iostream>
#include <string>
#include <algorithm>
//494     Kindergarten Counting Game
using namespace std;
int main()
{
    string str;
    int nWords;

    while(getline(cin,str,'\n'))
    {
        nWords = 0;
        bool isWord =false;
        string::iterator It;
        for( It= str.begin(); It!=str.end() ; ++It)
        {
            if((*It>='a' && *It<='z') || (*It>='A' && *It <='Z') )
            {
                if(!isWord) isWord = true;
            }
            else
            {
                if(isWord){
                    isWord = false;
                    nWords++;
                }
            }
        }
        --It;
        //防止最后的字符是字母的情况，不然会少加一；
        if((*It>='a' && *It<='z') || (*It>='A' && *It <='Z') && isWord)
            nWords++;
        cout<<nWords<<endl;

    }

}