Two contrasting viewpoints on the declaration of comments in a programming language are represented by Ada and C. In Ada, comments begin with adjacent hyphens and end with the end of the line.

-- this is an Ada comment

In C, comments begin with /* and proceed to a matching */ :

/* this is an C comment */

Compare these two comment features with respect to readability, writability, and reliability. C++ added a comment convention ( two forward slashes) similar to that of Ada. Why didnt C++ use exactly the Ada conversation ?