function copyfile(source,destination)

sourcefile = io.open(source,'r')

destinationfile = io.open(destination,'w')

for line in sourcefile:lines() do

   destinationfile:write(line)

end

sourcefile:close()

destinationfile:close()

end

copyfile('C:/1.txt','C/2.txt')

将C盘下的1.txt文件复制一份到C盘下的2.txt文件中

对于二进制文件没有试过，不知是否把上面的

sourcefile = io.open(source,'r')

destinationfile = io.open(destination,'w')

改为

sourcefile = io.open(source,'rb')

destinationfile = io.open(destination,'wb')

就可以

有兴趣的可以试验一下