sample input
Adventures in Disneyland
Two blondes were going to Disneyland when they came to a fork in the
road. The sign read: "Disneyland Left."
So they went home.
sample output
a
adventures
blondes
came
disneyland
fork
going
home
in
left
read
road
sign
so
the
they
to
two
went
were
when
通过这道题，学习了一下set和stringstream。
1 #include<iostream> 2 #include<string> 3 #include<set> 4 #include<sstream> 5 using namespace std; 6 7 set<string> dict;//string集合 8 9 int main() 10 { 11 string s,buf; 12 while(cin>>s) 13 { 14 for(int i = 0;i<s.length();i++) 15 {//将不是字母的都处理为‘ ‘ 16 if(isalpha(s[i])) s[i] = tolower(s[i]);else s[i] = ‘ ‘; 17 } 18 stringstream ss(s); 19 while(ss >> buf) dict.insert(buf); 20 } 21 for(set<string>::iterator it = dict.begin();it != dict.end();it++) 22 cout<<*it<<endl; 23 return 0; 24 }