do
	--create coroutine table
	--coroutine state: suspended, running, dead, normal
	--when create the coroutine, the status is suspended, After calling it, the status is dead
	--get the coroutine status by the way coroutine.status
	local coA = 0;
	local coB = 0;

	function createCoroutineA()

		coA = coroutine.create(
										function()
											--for i = 0, 10 do
												print("coA: ", 0);
												print("coB status: ", coroutine.status(coB)); --normal status
												print("coA status: ", coroutine.status(coA));
												print("coA coroutine next status");
												--coroutine.yield();--the current coroutine is suspended
											--end
										end
									);
		print("From coA to resume coB");
	end


	function createCoroutineB()

		coB = coroutine.create(
										function()
											--for i = 0, 10 do
												print("coB: ", 0);
												print("coA status: ", coroutine.status(coA));
												coroutine.resume(coA); --when resume coA, the coB will suspended, calling coB ,the coA status is
												--suspended and dead, this time will continue to execute the next code
												print("coB status: ", coroutine.status(coB));
												print("coB coroutine next status");
												--coroutine.yield();
											--end
										end
									);
		print("From coB to resume coA");
	end

	--display the coA and coB status
	createCoroutineA();
	print(coroutine.status(coA));

	createCoroutineB();
	print(coroutine.status(coB));

	coroutine.resume(coB);
	print(coroutine.resume(coB)); --if the coroutine is dead ,the resume will resume false, and can't resume the dead coroutine
	--print("coA status: ", coroutine.status(coA));
	--print("coB status: ", coroutine.status(coB));
end

do
	--create coroutine table
	--coroutine state: suspended, running, dead, normal
	--when create the coroutine, the status is suspended, After calling it, the status is dead
	--get the coroutine status by the way coroutine.status
	local coA = 0;
	local coB = 0;

	function createCoroutineA()

		coA = coroutine.create(
										function(paramA, paramB)
											--for i = 0, 10 do
												print("coA: ", 0);
												coroutine.yield(paramA, paramB);--the current coroutine is suspended
											--end
											return 100, 200;
										end
									);
		print("From coA to resume coB");
	end


	function createCoroutineB()

		coB = coroutine.create(
										function()
											--for i = 0, 10 do
												print("coB: ", 0);
												print("coA status: ", coroutine.status(coA));
												coroutine.resume(coA); --when resume coA, the coB will suspended, calling coB ,the coA status is
												--suspended and dead, this time will continue to execute the next code
												print("coB status: ", coroutine.status(coB));
												print("coB coroutine next status");
												--coroutine.yield();
											--end
										end
									);
		print("From coB to resume coA");
	end
	createCoroutineA();
	--if not yield is waiting ,the return values that the main function return as the results of the resume
	--or the return as the yield params
	print( coroutine.resume(coA, 10, 20));--OutPut:true, 10, 20



end