从键盘输入三个数,判断这三个数是否能构成三角形,如果是,输出“the three numbers could be th

从键盘输入三个数,判断这三个数是否能构成三角形,如果是,输出“the three numbers could be the sides of a triangle”,如果不是输出“the three numbers could’t the sides of a triangle”;并判断这个三角形是不是直角三角形,如果是,输出“the numbers could be the sides of a right angle triangle”,如果不是,输出“the numbers could’t the sides of a right angle triangle”.