You should use the easiest way to resolve this problem by using C++ Programming Language with functions:

Write a program that calculates students tuition per semester. Request a students resident status (resident/non-resident), standing (graduate/undergraduate) and the number of credits taken. If a students credits fall below 6hrs or go above 18hrs the student must add or drop a class. If a student is an undergraduate resident the cost per credit is $90, but if the student is, an undergraduate non-resident the cost per credit is $150. If a student is a graduate resident the cost per credit is $110, but if the student is, a graduate non-resident the cost per credit is $180. The program should have a function to request user input, a function that checks student credit hours and a function to calculate the cost of tuition and returns the value back to the credit function.