C++程序设计语言练习5.11 map标准库应用

代码如下：

#include <iostream>#include <map>#include <string>using std::cout;using std::cin;using std::map;using std::string;using std::pair;int _tmain(int argc, _TCHAR* argv[]){string str;map<string, int> words;while (cin >> str) {if (str == string("Quit")) {break;}map<string, int>::iterator iter = words.find(str);if (iter != words.end()) {iter->second += 1;}else{words.insert(pair<string, int>(str, 1));}}return 0;}

map 在插入新的元素时，会按key的值自动排序保存。