取三个数的中间值

1. 假定a b c中a是中间值，则(b – a) * (a – c) >= 0
2. 假定a b c中b是中间值，则(a – b) * (b – c) >= 0
3. 假定a b c中c是中间值，则(a – c) * (c – b) >= 0

public class 查找三个数的中间值 { 

	public static void main(String[] args) { 
		// TODO Auto-generated method stub
		System.out.println(f(5, 10, 0));
	}

	private static int f(int a, int b, int c) { 
		if ((b - a) * (a - c) >= 0) { 
			return a;
		} else if ((a - b) * (b - c) >= 0) { 
			return b;
		} else { 
			return c;
		}
	}

}