为什么我的do while循环永远不会结束？C++

菜单

开始用虚空函数写谚语

}while (wordCode != QUIT_MENU);

return 0;
}

您没有输入有效的选择。 请输入1或2

无论选择什么值，上面的文本都会不断重复。

为什么要重复

void writeProverb (int wordCode)
{
 //Fill in the body of the function to accomplish what is described above

if (wordCode == 1)
{
    cout << "Now is the time for all good men to come to the aid of their party." << endl;
}

if (wordCode == 2)
{
    cout << "Now is the time for all good men to come to aid the aid of their country." << endl;
}

}

用户输入：

while (wordCode >= 1 || wordCode <= 2)

无论用户输入什么数字，条件都不会变为假。

改变

           wordCode >= 1      wordCode <= 2            
1              True                True            -> True  || True -> True
-1             False               True            -> False || True -> True
2              True                True            -> True  || True -> True
3              True                False           -> True  || False -> True
999999         True                False           -> True  || False -> True
-99999         False               True            -> False || True -> True

---

你不希望那个部分循环；外部的do/while处理得很好。您只需要输出一次消息。

要添加到Marc B的答案中，我想您需要在wordCode==1 | | wordCode==2时更改，而wordCode>=1 | | wordCode=1&&wordCode如果为真，这有什么不同

while (wordCode >= 1 || wordCode <= 2)

           wordCode >= 1      wordCode <= 2            
1              True                True            -> True  || True -> True
-1             False               True            -> False || True -> True
2              True                True            -> True  || True -> True
3              True                False           -> True  || False -> True
999999         True                False           -> True  || False -> True
-99999         False               True            -> False || True -> True

while (wordCode >= 1 || wordCode <= 2)

if (wordCode == 1 || wordCode == 2)