Python：遊戲：測試打字速度

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現在寫書的人真是一點責任心都沒有，最近看了幾本書，其中的代碼都存在錯誤。

最近迷戀 Python 遊戲，買了《Python遊戲編程入門》[美] Jonathan S·Harbour 著 一書來看。

其中第四章：Bomb Catcher遊戲中，測試打字速度的程式碼嚴重有誤。

改程式螢幕上隨機顯示一個字母，按鍵輸入該字母后隨機顯示下一個，計算平均一分鐘可以輸入多少個字母，原代碼中計算速度的一塊有誤，附上我修改後的代碼

import sysimport randomimport timeimport pygamefrom 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 = Falsecorrect_answer = 97     # aseconds = 11score = 0speed = 0clock_start = 0game_over = Truewhile 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 是一個元組，窮舉了所有的按鍵，未按下為 0，按下為 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()

 

Python：遊戲：測試打字速度