public static void funcI5() {
		Scanner input = new Scanner(System.in);
		int a = 0, b = 0, c = 0;
		int aa = 0, bb = 0, cc = 0;
		int swap = 0;

		System.out.println("輸入三角形的三邊長a, b, c");

		System.out.print("a = ");
		a = input.hasNext() ? input.nextInt() : 0;
		System.out.print("b = ");
		b = input.hasNext() ? input.nextInt() : 0;
		System.out.print("c = ");
		c = input.hasNext() ? input.nextInt() : 0;

		if (a > c) {
			swap = c;
			c = a;
			a = swap;
		} else if (b > c) {
			swap = c;
			c = a;
			a = swap;
		}

		aa = a * a;
		bb = b * b;
		cc = c * c;
		if (c < a + b) {
			if (cc == aa + bb)
				System.out.println("此為直角三角形");
			else if (cc > aa + bb)
				System.out.println("此為鈍角三角形");
			else if (cc < aa + bb)
				System.out.println("此為銳角三角形");
		} else
			System.out.println("這不是三角形");
	}