// for one-line remarks

NOTE : -

THIS CONTENT IS NOT ORIGINAL

2. // for one-line remarks

You can use // to type a remark:

using namespace std;         // Using the standard library namespace.
#include           // The iostream library is often used.

int main ()                  // The program's main routine.
{
  double a;                 // Declaration of variable a.

  a = 456.47;
  a = a + a * 21.5 / 100;   // A calculation.

  cout << a << endl;        // Display the content of a.

  return 0;                 // Program end.
}

Output

554.611

(The possibility to use // to type remarks has been added to C in C99 and ANSI C 2000.)

BIBILOGRAPHY / REFERENCE : - http://www.4p8.com/eric.brasseur/cppcen.html