(五)Lua函数
2016-08-24 01:42
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一般定义方式:
function add (a)
local sum = 0
for i = 1, #a do
sum = sum + a[i]
end
return sum
end
结果:23 5
Lua函数的参数是可变的
function add (a)
local sum = 0
for i = 1, #a do
sum = sum + a[i]
end
return sum
end
5.1 多重返回值
function find (a) local min = a[1] local max = a[1] for i = 1, #a do if a[i] > max then max = a[i] end if a[i] < min then min = a[i] end end return max, min end a = {8,10,23,12,5} print(find(a))
结果:23 5
5.2可变参数
function add (...) local s = 0 for i, v in ipairs({...}) do s = s + v end return s end print(add(3, 4, 10, 25, 12)) --> 54
Lua函数的参数是可变的
5.3具名参数
Lua将所有实参组织到一个table中,将这个table作为唯一具名实参传递给函数arg = {old="temp.lua", new="temp1.lua"} function rename (arg) print(arg.old, arg.new) end rename(arg)