打开一个输出文件流的方法包括 A. std::filesystem::path p{"out.txt"}; std::ofstream output{p}; B. std::ofstream output{"out.txt"}; C. std::filesystem::path p{"out.txt"}; std::ofstream output{}; output.open(p); D. std::filesystem::path p{"out.txt"}; p.open();
【简答题】Role Play: You (A) are an exhibitor at a trade show. You try to introduce your
products to a visitor (B) who passes by your stand. Role-play the situation
according to the following information.