# John B. Schneider
# CptS 111
# 1/24/2012
# HW 3b

# A program to evaluate an arithmetic expression for a given value.

def main(): 
    print(
        """Enter an arithmetic expression in terms of the variable x.
In addition to x, your expression may contain numeric constants
and parentheses.  The expression can use the following operators:

+, -  <=> addition, subtraction
/, *  <=> float division, multiplication
//    <=> integer division
%     <=> modulo (remainder)
**    <=> exponentiation
""")
    exp_str = input("Enter expression: ")
    x = eval(input("Enter numeric value for x: "))
    print()
    print("f(x) =", exp_str)
    print("f(", x, ") = ", eval(exp_str), sep="")

main()