'''
    DS2000
    Spring 2020
    Sample code from class -- functions

    January 14, 2020
'''

def count_undergrads():
    ''' Function: count_undergrads
        Parameters: none
        Returns: Number of undergrad students enrolled at NEU, an int
    '''
    return 18000

def acceptance_rate(applied, admitted):
    ''' Function: acceptance_rate
        Parameters: num students who applied (int),
                    num students admitted (int)
        Returns: acceptance rate, float
    '''
    acceptance = admitted / applied
    acceptance = acceptance * 100
    return acceptance

def pct_khoury(num_khoury):
    ''' Function: pct_khoury
        Parameters: num of khoury student (int)
        Returns: pct of u-grads who are in Khoury (float 0-1)
    '''
    ug = count_undergrads()
    pct = num_khoury / ug
    return pct

def tuition_increase(start_tuition, end_tuition):
    ''' Function: tuition_increase
        Parameters: two floats, the starting tuition and ending tuition
        Returns: a float (0-1), the percentage increase from start to end
    '''
    diff = end_tuition - start_tuition
    increase = diff / start_tuition
    return increase

def main():

    # Here in main, we're just calling all our functions,
    # saving the result and printing them out
    ug = count_undergrads()
    print("There are", ug, "undergrad students at Northeastern")

    rate = acceptance_rate(20000, 5000)
    print("NEU's acceptance rate was ", round(rate, 2), "%", sep = "")

    khoury = int(input("How many Khoury undergrad students are there?\n"))
    pct = pct_khoury(khoury)
    print(round(pct, 2), "of undergrads are in Khoury College")

    increase = tuition_increase(49471, 51522)
    print("Tuition went up by ", round(increase * 100, 2), "%", sep = "")

main()