cPP primer after-class questions:
Exercise 1.8
indicate which of the following statements are valid, if any
std::cout << "/*";
std::cout << "*/";
std::cout << /* "*/" */;
std::cout << /* "*/" /* "/*" */;
 predict the results of compiling these statements, actually compile these statements to verify your answers, and correct each compilation error. 
. 
 looked at the answer to the after-class question and looked confused. I would like to ask you why there is such a hint during the compilation of the third sentence: 
 hello.cc:7:5: error: missing "character 
 std::cout<</* "*/" */;
modify to the following
std::cout<</* "*/" */";
correct, there are three quotation marks, do not match, what is the principle, kneel for explanation.
