第一个程序是用C++写的，要想实用UI，还得下载Easyx。有效输入大概长这样：CSC3002 “Tu0830-0930+Th0830-0930”。换行后输入“end”运行。 如果下载Easyx太麻烦了，你也可以下载 "Lesson_Arrange_4.cpp" 并运行这个文件（该文件和其他文件无关）。但是这个程序不会在你输入错误格式时提醒你。 我让"Lesson_Arrange_4.cpp"这个代码只输出前五项课程表，以防过多的输出让你的终端很难看，如果你需要更多可能的课程表（比如输入了20学分的课但并不准备报那么多），那么你可以修改代码（把main的最后一个if判断修改为"outputall(schedules)"），然后查看后面的课程表。越后面课程越少。 The first program is based on C++, and if you want to use UI, you also need a tool called Easyx. The vaild format is "lessonname time"(such as "CSC3002 Tu0830-0930+Th0830-0930"). If you are unwilling to download Easyx, you can only download the program called "Lesson_Arrange_4.cpp", which can also print the schedule. But you may not be warned if you input the wrong message. The program will work after you type "enter" and "end". In order to make your output in "Lesson_Arrange_4.cpp" short, I only allow it to print five schedules. If you need more, please change "if......else......" to "outputall(schedules)" in the final of main.