494 - Kindergarten Counting Game

最新推荐文章于 2016-08-19 23:44:21 发布

hellosijian

最新推荐文章于 2016-08-19 23:44:21 发布

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分类专栏：算法与数据结构文章标签： iterator string output each

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本文介绍了一个名为“幼儿园计数游戏”的简单程序，该程序能够读取一系列包含多个单词的行，并统计每行中单词的数量。文章提供了完整的C++代码实现，通过迭代字符串并检查每个字符来判断是否为单词的一部分，以此进行计数。

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Kindergarten CountingGame

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 andOutput

Input to your program will consist of a series of lines, eachline containing multiple words (at least one). A ``word'' isdefined as a consecutive sequence of letters (upper and/or lowercase).

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

SampleInput

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 ...

SampleOutput

#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;

    }
}