• setprecision:  Sets the number of digits to be printed to the right of the decimal point.
• fixed:  Use fixed point notation for floating-point numbers (as opposed to scientific notation).  If no precision has already been specified, the use of this manipulator will set the precision to 6 by default.
• showpoint:  Causes the decimal point to be printed even if the precision is set to zero and the values printed are whole numbers.
• setw:  Sets minimum field (column) width on output.  This sets the minimum size of the field.  A larger number will use more columns.
• endl:  Writes a newline ('\n') and flushes the buffer.

These manipulators which are used in the two programs in this lesson.

There are many other manipulators that you can learn about here and here if you are interested in pursuing the topic further.