您必须选择整行（即从该行的第一个字符开始），以便也将c ++注释用于多行。

You have to select the whole line (i.e. from the very first character of the line) in order to use c++ comments for multiple lines too.

更新：如果所选行之间有注释，请按Ctrl +即使选择不是从行首开始，K，Ctrl + C也会生成C ++样式的注释。

Update: if there are comments among the selected lines, Ctrl+K,Ctrl+C will generate C++ style comments even if the selection does not start from the beginning of the lines.