很纳闷,难得碰上这么简单的题,调了很久也没发现哪里错了,大佬们可以帮我指明一下吗? 第二题: #include<iostream> #include<string> #include<vector> using namespace std; string Tran(int nNum) { vector<string>v4 = { "","M","MM" ,"MMM" ,"MMMM" ,"MMMMM" ,"MM...