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

# Program to exercise the capabilities of the function fixed_precision().

def main():
    x = eval(input("Enter a numeric expression: "))
    print("Using print() = ", x)
    n = int(input("Enter desired number of digits: "))
    print("Using fixed_precision() = ", end="")
    fixed_precision(x, n)
    
def fixed_precision(x, n):
    int_part = int(x)
    x = x - int_part
    frac_part = int(x * 10 ** n)
    print(int_part, ".", frac_part, sep="")

def main():
    x = eval(input("Enter a numeric expression: "))
    print("Using print() = ", x)
    n = int(input("Enter desired number of digits: "))
    print("Using fixed_precision() = ", end="")
    fixed_precision(x, n)
    
main()