lua中的io

--[[    Lua中的IO模型    1、了解模型中的read和write    2、IO库复杂模型的性能小诀窍       读取二进制文件（就是在原来的基础上加b）       local f = assert(io.open("ok.txt",'rb'))--local m = require("io")--m.write("ok\n")io.write("ok\n")io.write("sin(3）= ",math.sin(3),"\n")io.write(string.format ("sin(3) = %6f\n",math.sin(3)))--*all 表示读取整个文件--*line 表示读取下一行--*number 表示读取一个数字--<num> 表示读取一个不超过num个的字符的字符串 有点问题--tt = io.read("*all") --print(tt)local f = assert(io.open("ok.txt",'r'))local m = f:read("*all")f:close()   --注意别忘了print(m)]]local f = assert(io.open("ok.txt",'r'))--local t = f:read("*all")local BufferSize = 2^13 --8kf:read(BufferSize, "*line")  -- 提高性能f:close()function my_write(message)    local file = assert(io.open("ok.txt",'a'))    file:write(message)    file:close()endmy_write("Hello liuyongtao")function write_other(msg)    local file = assert(io.open("a.txt","a"))    local temp =io.input()    file:input("newinput.txt")    file:write(msg)    io.input():close()    io.input( file ) end