不韋 呂 / Mbed 2 deprecated Examples_for_ALL_STM

いろいろなテクニック．Nucleo と DISCO-F746 用．

Dependencies:   Array_Matrix mbed

FunctionObject.hpp@0:bb939e0bc6e2, 2017-10-15 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Oct 15 11:41:48 2017 +0000
Revision:
0:bb939e0bc6e2
Child:
1:bbb9f0c3e523
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:bb939e0bc6e2 1
MikamiUitOpen 0:bb939e0bc6e2 2 class Func
MikamiUitOpen 0:bb939e0bc6e2 3 {
MikamiUitOpen 0:bb939e0bc6e2 4 public:
MikamiUitOpen 0:bb939e0bc6e2 5 virtual ~Func() {}
MikamiUitOpen 0:bb939e0bc6e2 6 virtual float operator()(float) = 0;
MikamiUitOpen 0:bb939e0bc6e2 7 };
MikamiUitOpen 0:bb939e0bc6e2 8
MikamiUitOpen 0:bb939e0bc6e2 9 float Integrate(Func &f, float a, float b)
MikamiUitOpen 0:bb939e0bc6e2 10 {
MikamiUitOpen 0:bb939e0bc6e2 11 const int N = 1000;
MikamiUitOpen 0:bb939e0bc6e2 12 float step = (b - a)/N;
MikamiUitOpen 0:bb939e0bc6e2 13 float s = 0.0f;
MikamiUitOpen 0:bb939e0bc6e2 14 while(a < b)
MikamiUitOpen 0:bb939e0bc6e2 15 {
MikamiUitOpen 0:bb939e0bc6e2 16 s += f(a)*step;
MikamiUitOpen 0:bb939e0bc6e2 17 a += step;
MikamiUitOpen 0:bb939e0bc6e2 18 }
MikamiUitOpen 0:bb939e0bc6e2 19 return s;
MikamiUitOpen 0:bb939e0bc6e2 20 }
MikamiUitOpen 0:bb939e0bc6e2 21
MikamiUitOpen 0:bb939e0bc6e2 22 float aFunc1(float x) { return x; }
MikamiUitOpen 0:bb939e0bc6e2 23 float aFunc2(float x) { return x*x; }
MikamiUitOpen 0:bb939e0bc6e2 24
MikamiUitOpen 0:bb939e0bc6e2 25 class DerivFunc: public Func
MikamiUitOpen 0:bb939e0bc6e2 26 {
MikamiUitOpen 0:bb939e0bc6e2 27 public:
MikamiUitOpen 0:bb939e0bc6e2 28 DerivFunc(float (*f)(float)) : f_(f) {}
MikamiUitOpen 0:bb939e0bc6e2 29 virtual float operator()(float d) { return f_(d); }
MikamiUitOpen 0:bb939e0bc6e2 30 private:
MikamiUitOpen 0:bb939e0bc6e2 31 float (*f_)(float);
MikamiUitOpen 0:bb939e0bc6e2 32 };
MikamiUitOpen 0:bb939e0bc6e2 33
MikamiUitOpen 0:bb939e0bc6e2 34 void MyFunctionObject()
MikamiUitOpen 0:bb939e0bc6e2 35 {
MikamiUitOpen 0:bb939e0bc6e2 36 DerivFunc fx1(aFunc1);
MikamiUitOpen 0:bb939e0bc6e2 37 float area = Integrate(fx1, 0.0, 1.0);
MikamiUitOpen 0:bb939e0bc6e2 38 printf("\r\nArea = %f\r\n", area);
MikamiUitOpen 0:bb939e0bc6e2 39
MikamiUitOpen 0:bb939e0bc6e2 40 DerivFunc fx2(aFunc2);
MikamiUitOpen 0:bb939e0bc6e2 41 area = Integrate(fx2, 0.0, 1.0);
MikamiUitOpen 0:bb939e0bc6e2 42 printf("Area = %f\r\n", area);
MikamiUitOpen 0:bb939e0bc6e2 43 }