# File: ChapterControlFunc/menu.py
"""
Compute circle.
0.quit
1.area
2.circ
Option (0 quit-1-2)? 2
Radius?3
18.84
Compute circle.
0.quit
1.area
2.circ
Option (0 quit-1-2)? 0
"""
PI = 3.14
def area(r):
    print (r *r *PI)

def circ(r):
    print (2 * r * PI)

def main():
    while True:
        print("Compute circle.\n0.quit\n1.area\n2.circ")
        op = int(input("Option (0 quit-1-2)? " )) # option
        if (op == 0):
            break
        if (op == 1):
            r = float(input("Radius?"))
            area(r)
        elif (op == 2):
            r = float(input("Radius?"))
            circ(r)
        else:
             print("bad option")   

main()