lua 基础

1.基础语法

print("hello world")

--[[sss
sss
ss --]]
--变量申明可以直接写名字
--一共有五种类型     根据数据去确定数据类型
mytablename = {12,122,1}
print(mytablename[1])
-- lua 默认变量都是全局的变量
-- string 可以单引号
-- 数组第一位索引是1


hp =59;
if(hp<90) then
 print('不及格')
end


if hp>90 then
   print("niubi")
elseif hp>60 and hp < 80 then
   print("及格")
else
    print("bujige")
print("nige shabi")
end
--lua 没有自增自减运算符号
index = 1


while index < 3 do  index = index + 1 end
print (index)


repeat index = index +1
until index >=3


print (index)   --4




sum = 0
for index1 = 1,100  do
  sum = sum + index1
  if(sum > 100) then
  sum = 1000
  break
  end
 end

print(sum)

function  Plus ( num1 , num2)
  return  num1 + num2
end


resoult = Plus(11,11)
print(resoult)


print(math.abs(-1))
print(math.max(1,2,3,4))




str1 = "heh"
str2 = "bab"
print(string.sub(str1,1,2)..str2)




matable1 = {}
matable1[1] = "mmmm"
matable1["n"] = "nnnn"


print(matable1.n)
print(matable1['n'])


myt = { name = "heheh",age = 10, sex = "men",h="ke"}
print(myt[1])  --nil
print(myt[name])--nil
print(myt['name'])--"heheh"
print(myt.name)--"heheh"
myt1 = { "a","b","c"}
--print( myt1[1])


--[[for i = 1,3 do
print(myt1[i])
end
]]--


--[[i=1
while i<4 do
print(myt1[i])
i = i+1
end
]]--


--[[for i = 1,table.getn(myt1) do
--i = i+2
print (myt1[i])


end
]]--
-- 所有都能遍历的数组
for index ,value in pairs(myt) do
print(index,value)
end


--也可以
for index1 ,value1 in pairs(myt1) do
print(index1 ,value1)
end


t = { name = "fei",age = 13,high = 120}


--table.insert(t,2,2)
--print(t[2])
table.insert(t,"hehheh")
---位置是n+1 但是默认的key 是 1 开始
for key,value in pairs(t) do
print( key ,value)
end

2，面向对象
Enemy = {}
-- 关键字  可以索引当前对象
local this = Enemy


Enemy.hp = 10
Enemy.speed = 100
Enemy.hurt = 1
--方法可以放在变量中
Enemy.move = function ()


print("敌人在移动",this.speed)
end


--Enemy.move()  --调用
--this.move()   --调用








Player = {}
Player.hp = 100
Player.speed = 10
Player.hurt =111
Player.name ="shabi"
Player.Move = function (i,j)
              Player.hp = i
 Player.speed =j
 print(Player.hp,Player.speed)
 end


--Player.Move(1,1)


function  Player.Attack (j)
 Player.hurt = j
 print(Player.hurt)
 Enemy.hp = Enemy.hp -j
 print(Enemy.hp)
end
---自动改变赋值类型
Player.Attack("1")  --1 9
Player.Attack(2) -- 2 7