说明：  用遗传算法求函数 max f(x1,x2) = 100 (x1^2-x2^2)^2 + (1-x1)^2, -2.005 ≤ xi ≤ 2.005 的最大值
(Using genetic algorithms get max f (x1, x2) = 100 (x1 ^ 2-x2 ^ 2) ^ 2+ (1-x1) ^ 2, when-2.005 ≤ xi ≤ 2.005 )