題意：輸入一個文本，找出所有不同的單詞，按字典序從小到大輸出。單詞不區分大小寫。

樣例輸入：

Adventures in DisneylandTwo blondes were going to Disneyland when they came to a fork in theroad. The sign read: "Disneyland Left."So they went home.

樣例輸出：

a
adventures
blondes
came
disneyland
fork
going
home
in
left
read
road
sign
8O
the
they
to
two
went
were
when

代碼如下：

#include<set>
#include<iostream>
#include<sstream>
#include<string>
#include<cstring>
using namespace std;
 int main(int argc, char const *argv[]) {
  string s,temp;
  set<string>dict;
  set<string>::iterator it;
  stringstream ss;
  while(cin>>s){
    
 
for(int i=0;i<s.length();i++){
      if (isalpha(s[i])) {
        s[i]=tolower(s[i]);//字母變為小寫
      }
      else s[i]=‘ ‘;//將所有標點符號變為空格
      
      
    }stringstream ss(s);
      while(ss>>temp){
        dict.insert(temp);//將轉換後的單詞輸入set
      }
  }
  for(it=dict.begin();it!=dict.end();it++){
    std::cout 
 
<< *it << ‘\n‘;//按字典序輸出
  }
  return 0;
}

uva 10815,andy's first ditionary（set，stringstream的簡單運用）