重複，直到在lua中循環

Question

我在做我的lua代碼有什麼問題？

local which 

print("Type f to convert fahrenheit to celsius and c to convert celsius to fahrenheit") 
which = io.read() 
repeat 
    if which=="f" then 
     local c 
     local f 
     print("input your fahrenheit temperature") 
     f = tonumber(io.read()) 
     c = (f-32)/1.8 
     print(c) 
    end 

    elseif which=="c" then 
     local ce 
     local fa 
     print("input your celsius temperature") 
     c = tonumber(io.read()) 
     f = (c*1.8)+32 
    end 

    else do 
    print("Type f to convert fahrenhiet to celsius and c to convert celsius to fahrenheit") 
until which=="f" or which=="c" 

Answer 1

您正在關閉if塊。刪除您用於關閉if和elseif的對賬單end，並在else之後放行。

local which 

print("Type f to convert fahrenheit to celsius and c to convert celsius to fahrenheit") 
which = io.read() 
repeat 
    if which=="f" then 
     local c 
     local f 
     print("input your fahrenheit temperature") 
     f = tonumber(io.read()) 
     c = (f-32)/1.8 
     print(c) 

    elseif which=="c" then 
     local ce 
     local fa 
     print("input your celsius temperature") 
     c = tonumber(io.read()) 
     f = (c*1.8)+32 

    else 
     print("Type f to convert fahrenhiet to celsius and c to convert celsius to fahrenheit") 
    end 
until which=="f" or which=="c" 

---

附：：這可能會導致你無限循環。在重複內部的每次迭代之前，您需要更新which。

Answer 2

應該有elseif之前沒有end。 end之前也不應該有do之後else之後。而且應該有一個end後else部分和until前：

repeat 
    if ... then 
    ... 
    elseif ... then 
    ... 
    else 
    ... 
    end 
until ... 

下一次，如果你發佈至少你的問題是什麼（錯誤信息，意外輸出等）也將是有益的。

Answer 3

local which 
repeat 
    print("Type f to convert fahrenheit to celsius and c to convert celsius to fahrenheit") 
    which = io.read() 
    if which=="f" then 
     local c 
     local f 
     print("input your fahrenheit temperature") 
     f = tonumber(io.read()) 
     c = (f-32)/1.8 
     print(c) 

    elseif which=="c" then 
     local c 
     local f 
     print("input your celsius temperature") 
     c = tonumber(io.read()) 
     f = (c*1.8)+32 
     print(f) 
    end 
    print("do you want to play again? y/n?") 
    antwort = io.read() 


until antwort ~= "y"