我第一次涉足lua,这只是行不通.它说我试图调用全局exiter(零值).我只是在做一个简单的程序来尝试让函数工作.
print("hello world")
io.read()
y = 0
while y < 10 do
local x = ""
print("hello world")
x = io.read()
if x == "y" then
y = exiter(1)
print(y)
end
end
function exiter(param)
local q = 0
print ("hello again")
q = param * 10
return q;
end
解决方法
Lua程序从上到下逐个语句执行.因此,当你进入while循环时,函数exiter还没有出现.在进入循环之前定义它：
function exiter(param)
local q = 0
print ("hello again")
q = param * 10
return q;
end
while y < 10 do
local x = ""
print("hello world")
x = io.read()
if x == "y" then
y = exiter(1)
print(y)
end
end