模拟温度显示控件编写，显示温度在0-100℃升降变化。-Analog temperature display control to write, show that the temperature rise and fall in the 0-100 ℃.

用C++实现了梯度下降求多元函数极值的算法,有可能会陷入局部最优解-By c++ implementation of a gradient descent algorithm of multivariate function extreme value, is likely to fall into local optimal solution