UVA10815 Andy's First Dictionary(STL)
2015-12-10 19:44
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Andy's First Dictionary
Andy, 8, has a dream - he wants to produce his very own dictionary. This is not an easy task for him, as the number of words that he knows is, well, not quite enough. Instead of thinking up all the words himself, he has a briliant idea. From his bookshelf he
would pick one of his favourite story books, from which he would copy out all the distinct words. By arranging the words in alphabetical order, he is done! Of course, it is a really time-consuming job, and this is where a computer program is helpful.
You are asked to write a program that lists all the different words in the input text. In this problem, a word is defined as a consecutive sequence of alphabets, in upper and/or lower case. Words with only one letter are also to be considered. Furthermore,
your program must be CaSe InSeNsItIvE. For example, words like "Apple", "apple" or "APPLE" must be considered the same.
Sample
Sample
//题意就是:输入一个文本,找出所有不同的单词(连续的字母序列),按字典序升序输出。单词不区分大小写。
//用C++的标准模板,使用了集合:set,还有用stringstream得到各个单词。
Andy, 8, has a dream - he wants to produce his very own dictionary. This is not an easy task for him, as the number of words that he knows is, well, not quite enough. Instead of thinking up all the words himself, he has a briliant idea. From his bookshelf he
would pick one of his favourite story books, from which he would copy out all the distinct words. By arranging the words in alphabetical order, he is done! Of course, it is a really time-consuming job, and this is where a computer program is helpful.
You are asked to write a program that lists all the different words in the input text. In this problem, a word is defined as a consecutive sequence of alphabets, in upper and/or lower case. Words with only one letter are also to be considered. Furthermore,
your program must be CaSe InSeNsItIvE. For example, words like "Apple", "apple" or "APPLE" must be considered the same.
Input
The input file is a text with no more than 5000 lines. An input line has at most 200 characters. Input is terminated by EOF.Output
Your output should give a list of different words that appears in the input text, one in a line. The words should all be in lower case, sorted in alphabetical order. You can be sure that he number of distinct words in the text does not exceed 5000.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
//题意就是:输入一个文本,找出所有不同的单词(连续的字母序列),按字典序升序输出。单词不区分大小写。
//用C++的标准模板,使用了集合:set,还有用stringstream得到各个单词。
#include<iostream> #include<string> #include<set> #include<sstream> using namespace std; set<string> dict; int main() { string s,buf; while(cin>>s) { for(int i=0;i<s.length();i++) { if(isalpha(s[i])) s[i]=tolower(s[i]); else s[i]=' '; //将输入的非字符转换为空格,作为单词的分界点。 } stringstream ss(s);//将数组s导入流 ss中 while(ss>>buf) dict.insert(buf);//从流里导出标准的string类,加入集合后,自动取消重复单词,并升序排列。 } for(set<string>::iterator it=dict.begin();it!=dict.end();it++) cout<<*it<<"\n"; return 0; }
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