Python不检测一个变量何时等于另一个variab

Question

我正在为我的家人制作一个保存乒乓球成绩的程序。当比分达到极限时，它应该结束比赛并说出谁赢了。这对一个球员有效，但对另一个球员无效，我不知道为什么。当P2的得分达到11分时，它表示P2获胜并重新开始，但当P1的得分达到11分时，它继续前进。请记住，我是新来的。代码如下：

import sys

def defaults():
    global p1sc
    global p2sc
    global p1adv
    global p2adv
    global p1name
    global p2name
    global sclimit
    p1sc = 0
    p2sc = 0
    p1adv = 0
    p2adv = 0
    p1name = "Player 1"
    p2name = "Player 2"
    sclimit = 11

def checkwin():
    global p1sc
    global p2sc
    global p1name
    global p2name
      global sclimit
    if p2sc < sclimit:
        program()
    if p1sc < sclimit:
        program()
    if p2sc <= sclimit:
        print(p2name + " wins!")
         defaults()
        print("New game!")
        program()
     if p1sc <= sclimit:
        print(p1name + " wins!")
        defaults()
        print("New game!")
        program()
    elif p1sc == sclimit - 1 and p2sc == sclimit - 1:
        print("Sudden Death!")
        suddendeath()
    else:
        print("DEBUG: CHECKWIN FAILED")

def displayscore():
    global p1name
    global p2name
    global p1sc
    global p2sc
    print(p1name + ": " + str(p1sc))
    print(p2name + ": " + str(p2sc))

def program():
    global p1sc
    global p2sc
    global p1name
    global p2name
    global sclimit
    cmdinput = str(raw_input("Command: "))
    if cmdinput == "1":
        p1sc = p1sc + 1
        displayscore()
        checkwin()
    elif cmdinput == "2":
        p2sc = p2sc + 1
        displayscore()
        checkwin()
    elif cmdinput == "q":
        p1sc = p1sc - 1
        displayscore()
        checkwin()
    elif cmdinput == "w":
        p2sc = p2sc - 1
        displayscore()
        checkwin()
    elif cmdinput == "name":
        p1name = str(raw_input("Player 1 name: "))
        print("Player 1 name has been set to " + p1name)
        p2name = str(raw_input("Player 2 name: "))
        print("Player 2 name has been set to " + p2name)
        program()
    elif cmdinput == "limit":
        sclimit = raw_input("Score limit: ")
        print("Score limit has been set to " + str(sclimit))
        program()
    elif cmdinput == "exit":
        sys.exit()
    else:
        print("Command not recognised")
        program()

def suddendeath():
    global p1name
    global p2name
    global p1adv
    global p2adv
    cmdinput = str(raw_input("Command: "))
    if cmdinput == "1":
        if p2adv == 0:
            p1adv = 1
        elif p2adv == 1:
            p2adv = 0
        elif p1adv == 1:
            print(p1name + " wins!")
            defaults()
            print("New game!")
            program()
    elif cmdinput == "2":
        if p1adv == 0:
            p2adv = 1
        elif p1adv == 1:
            p1adv = 0
        elif p2adv == 1:
            print(p2name + " wins!")
            defaults()
            print("New game!")
            program()

defaults()
program()

Answer 1

您的程序在条件方面有一些问题，现在应该可以工作了：

def checkwin():
    ...
    #call program only if both player's score is less than the limit
    if p2sc < sclimit and p1sc < sclimit:
        program()

    #use if-elif conditions here, and you need `>=` here not `<=`.
    if p2sc >= sclimit:
        print(p2name + " wins!")
        defaults()
        print("New game!")
        program()
    elif p1sc >= sclimit:
        print(p1name + " wins!")
        defaults()
        print("New game!")
        program()
    ...

演示：（将sclimit更改为3）

$ python so.py
Command: 1
Player 1: 1
Player 2: 0
Command: 1
Player 1: 2
Player 2: 0
Command: 2
Player 1: 2
Player 2: 1
Command: 1
Player 1: 3
Player 2: 1
Player 1 wins!
New game!
Command: 1   
Player 1: 1
Player 2: 0
Command: 2
Player 1: 1
Player 2: 1
Command: 2
Player 1: 1
Player 2: 2
Command: 2
Player 1: 1
Player 2: 3
Player 2 wins!
New game!
Command: