UVa 494 - Kindergarten Counting Game

https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=94&page=show_problem&problem=435

思路：题目为求一行中单词的个数；设置flag标志上一个单词已结束，当遇到英文字符且flag为true，则为新单词；当遇到非英文字符，则单词结束；

#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;

int main()
{
  //freopen("input.txt","r",stdin);
   int count,i;
   string s;
   bool flag;
   while(getline(cin,s))
   {
      flag=true;
      count=0;
      for(i=0;i<s.length();i++)
         {
            if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z'))
                     {
                          if(flag)
                              count++;
                          flag=false;
                      }
           else 
                 flag=true;
         }
         cout<<count<<endl;
    }
      return 0;
 }