摘要： 先看下面一段代码： 1 ifstream input; 2 vector<string>::const_iterator it = files.begin(); 3 // for each file in the vector 4 while (it != files.end()) { 5 input.open(it->c_str()); // open the file 6 // if the file is ok, read and "process" the input 7 if (!inp... 阅读全文