Embed comment into source code. in C++
Embed comment into source code.
// handles string after // as comments.
// can be written after statement like function, assigning variable, etc...
/* - */ handles string included by /* */ as comments.
/* - */ can be embedded between statements.
/* - */ can handle multiple comment lines.
/* - */ can not be embedded into other /* - */.
comment.cpp 
#include <iostream>

int main(void) {
  // one line comment

  std::cout << "one line comment can write after statement" << std::endl; // one line comment

  /* This comment style can be written in multi lines like the following */
  /*
    line 1
    line 2
  */
  /* This comment style can be embedded in statement */
  std::cout << "This statement line includes" /* comment */ "comment" << std::endl;

  return 0;
}
Result 
$ g++ comment.cpp -o comment
$ ./comment
one line comment can write after statement
This statement line includescomment