程序1主要是利用两种不同的函数来绘制Peaks曲线，具有一定的借鉴意义。程序2、3还实现了三维绘图的功能和向量场的绘制。-Procedure 1 is mainly using two different functions to draw Peaks curve has a certain significance as reference. 2,3-D program also achieved drawing functions and draw the vector field.