本程序为berstein多项式逼近，也就是在证明weistrass逼近定理中所需要的多项式。这是一个函数程序，可以直接被当作函数来调用，做任意函数的逼近。内含调用测试用例。-This procedure for berstein polynomial approximation, that is, approximation theorem proved weistrass Polynomial needed. This is a function of the procedure can be used as a direct function to call, so arbitrary function approximation. Test Case containing call.