【pygame】Python 游戏入门，写个测试打字速度小游戏

现在写书的人真是一点责任心都没有，最近看了几本书，其中的代码都存在错误。

最近迷恋 Python 游戏，买了《Python游戏编程入门》[美] Jonathan S·Harbour 著 一书来看。

其中第四章：Bomb Catcher游戏中，测试打字速度的程序代码严重有误。

改程序屏幕上随机显示一个字母，按键输入该字母后随机显示下一个，计算平均一分钟可以输入多少个字母，原代码中计算速度的一块有误，附上我修改后的代码

import sys import random import time import pygame from pygame.locals import *


def print_text(font, x, y, text, color=(255, 255, 255)): imgText = font.render(text, True, color) screen.blit(imgText, (x, y)) pygame.init() screen = pygame.display.set_mode((600, 500)) pygame.display.set_caption('Keyboard Demo') font1 = pygame.font.Font(None, 24) font2 = pygame.font.Font(None, 200) white = (255, 255, 255) yellow = (255, 255, 0) key_flag = False correct_answer = 97     # a
seconds = 11 score = 0 speed = 0 clock_start = 0 game_over = True while True: for event in pygame.event.get(): if event.type == QUIT: sys.exit() elif event.type == KEYDOWN: key_flag = True elif event.type == KEYUP: key_flag = False keys = pygame.key.get_pressed()     # keys 是一个元组，穷举了所有的按键，未按下为 0，按下为 1
    if keys[K_ESCAPE]: sys.exit() if keys[K_RETURN]: if game_over: game_over = False clock_start = time.time() score = 0 seconds = 11 speed = 0 clock = clock_start if not game_over: current = time.time() - clock_start if seconds < current: game_over = True else: if keys[correct_answer]: correct_answer = random.randint(97, 122) clock_start = time.time() score += 1 speed = 60 * score / (clock_start - clock) screen.fill((0, 100, 0)) print_text(font1, 0, 0, "Let's see how fast you can type!") print_text(font1, 0, 20, "Try to keep up for 10 seconds...") if key_flag: print_text(font1, 500, 0, "<key>") if not game_over: print_text(font1, 0, 80, "Time: " + str(int(seconds-current))) print_text(font1, 0, 100, "Speed: " + str(int(speed)) + " letters/min") if game_over: print_text(font1, 0, 160, "Press Enter to start...") print_text(font2, 0, 240, chr(correct_answer-32), yellow) pygame.display.update()