c := make(chan int)
	go addc(1, 2, c)
	three(<-c)
	go fc(1, 2, c)
	three(<-c)
	go fnc()(1, 2, c)
	three(<-c)
	go func(a, b int, c chan int) { c <- a+b }(1, 2, c)
	three(<-c)

	emptyresults()
	noresults()
	nothing = emptyresults
	nothing()
	nothing = noresults
	nothing()