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| import re
ALTITUDE = 100
VELOCITY = 10
FUEL = 1000
STEP = 0
def match(regex, raw_str):
if re.match(regex, raw_str) is not None:
return True
return False
def yes(y_str):
return match("[yY].*", y_str)
def no(n_str):
return match("[nN].*", n_str)
def set_integer(param_name):
while True:
try:
value = input("Enter the initial {}".format(param_name))
value = int(value)
if value <= 0:
print(param_name, "must be positive")
else:
return value
except ValueError as e:
print("Please enter an integer")
class LunarLander:
def __init__(self):
self.altitude = ALTITUDE
self.velocity = VELOCITY
self.fuel = FUEL
self.step = STEP
def run(self):
self.__game__()
self.__init__()
while True:
play = input("Whether play again:(y/n)")
if yes(play):
self.__game__()
elif no(play):
break
def __game__(self):
self.__intro__()
reset = input("Reset parameters?(y/n)")
if yes(reset):
self.set_params()
while self.altitude > 0:
consumed_fuel = self.consume_fuel()
self.fuel = self.fuel - consumed_fuel
self.velocity = self.velocity + 1.6 - consumed_fuel * 0.15
self.altitude = self.altitude - self.velocity
self.step = self.step + 1
print("[Current State]", self.fuel, self.velocity, self.altitude, self.step)
self.__print_result__()
def consume_fuel(self):
if self.fuel == 0:
return 0
while True:
try:
fuel = input("Enter the fuel to use:")
fuel = int(fuel)
if fuel < 0:
print("Fuel cannot be negative.")
elif fuel > self.fuel:
print("Not enough fuel. Max fuel:", self.fuel)
else:
break
except ValueError as e:
print("Please enter an integer.")
return fuel
def __intro__(self):
print("Welcome to Lunar Lander")
print("Altitude is", self.altitude, "meters.")
print("Velocity is", self.velocity, "meters/second.")
print("Fuel amount is", self.fuel, "liters.")
def __print_result__(self):
result = "Safe" if self.velocity < 10 else "Not safe"
print(result, "landing.")
print("Velocity:", self.velocity)
print("Duration:", self.step)
print("Left fuel:", self.fuel)
def set_params(self):
self.altitude = set_integer("altitude")
self.velocity = set_integer("velocity")
self.fuel = set_integer("fuel")
lunar_lander = LunarLander()
lunar_lander.run()
|
