C++ Primer课后练习10.20，10.21
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//课后练习10.20#include<iostream>#include<vector>#include<string>#include<algorithm>#include<numeric>using namespace std;void elimdups(vector<string> & words){//按字典序排序sort(words.begin(), words.end());auto end_unique = unique(words.begin(), words.end());words.erase(end_unique, words.end());}void biggies(vector<string> & words,vector<string>::size_type sz){elimdups(words); //将word按字典序排序，删除重复单词stable_sort(words.begin(), words.end(),[](const string& s1, const string & s2){return s1.size() < s2.size(); });auto wc = count_if(words.begin(), words.end(),[sz](const string s){return s.size() >= sz; });cout << "there are " << wc << " words whose size is larger than 6" << endl;auto iter = words.end() - wc;for_each(iter, words.end(),[](const string & s){cout << s << endl; });}int main(void){vector<string> words;string word;while (cin >> word){words.push_back(word);}biggies(words, 6);return 0;}/*********************************************************************///课后练习10.21#include<iostream>using namespace std;int main(void){int num = 20;auto result = [& num]()->bool{if (num>0){num--;return false;}else return true;};while (!result()){cout << num << endl;}cout << result() << endl;}
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