是用蒙特卡洛算法 求解的正弦拟合曲线， 收敛于0.000000001； 还用到了伪随机数。 愿我们共同提高，一起进步！-Monte Carlo algorithm is the sine curve, converges to 0.000000001 also used the pseudo-random number. We would like to improve, with progress!