solution with c++

Given a text file containing unknown number of lines, each line containing three integer values representing the height of a building in (Yard foot inches) separated by space. Write a well-documented C++ program that 1. Reads the three values from the file, 2. If any of the read values is greater than 2000, prints on the screen an error message: "Error: invalid building length.!". 3. Otherwise, calculates the building length in inches, where one yard is 3 feet, and foot is 12 inches, 4. Sends to another file both length values: the read and the calculated as shown below. 5. Repeats steps (1-4) until a negative value is encountered