示範 PSO 程式如何解決問題，目標是要找出 x0 和 x1 的值，函式 f 的值 = 3 + x 0 ^2 + x 1 ^2 為最小化。物件類別有五個公用資料成員： 位置、 適用性、 速度、 bestPosition 和 bestFitness。-PSO program demonstrates how to solve the problem, the goal is to identify the value of x0 and x1, the value of the function f = 3+ x 0 ^ 2+ x 1 ^ 2 is minimized. Object class has five public members: location, applicability, speed, bestPosition and bestFitness.