基于遗传算法的函数优化，根据基本遗传算法方法原理，设 f(x) = -x^2 - 4x + 1，求 min f(x), xÎ [-2, 2],解的精度保留二位小数。-Function of the genetic algorithm-based optimization, according to the principles of the basic genetic algorithm method, set f (x) =-x ^ 2- 4x+ 1, seeking min f (x