通过vc实线相关正态分布的计算，计算正态分布的平均值等-The solid line through the vc related to the calculation of the normal distribution to calculate the average of the normal distribution, etc.

利用c语言生成符合正态分布的随机数，并在matlab程序中画出曲线图，并与理论值比较-Use c language to generate normally distributed random numbers and draw graphs in matlab program