这道题的思路就是三个三个的处理,根据题目要求实现就行了 #include <algorithm> #include <vector> #include <map> using namespace std; vector<string> v = { "and", "hundred", "thousand", "million", "billion" }; map<int,string> mtwenty = { {1,"one"},{2,"two"},{3,"three"},{4,"fo...