C++; please type the script

Write a program that reads a length measurement value from the user in an atomic physics experiment (in the nano meter range) and prints it to the screen in meters using 1) fixed point form with precision of 12, and 2) scientific form, where 1 nm = 10-9m Your program will prompt the user to enter the value inside your main function, then it will call two functions: void printFixedForm( double length); // prints length = 9.1 nm as 0.000000009100 void printScientific Form( double length); // prints length = 9.1 nm as 9.100000000000-09