« Mathc gnuplot/Tableau de pointeurs de fonctions » : différence entre les versions

double (*Derivate[3])(double (*P_f)(double x),double a,double h) = {fx,Dx_1Df_x,Dx_2Df_xx};

* Toutes les fonctions (fx,Dx_1Df_x,Dx_2Df_xx) ont la même forme : <tt>double ''fonction''(double (*P_f)(double x) double double)</tt>.

Il y a trois fonctions. (0,1,2)= {fx, Dx_1Df_x, Dx_2Df_xx}. La fonction fx donne f.

double Dx_1Df_x(

double Dx_2Df_xx(

double h) = {fx,Dx_1Df_x,Dx_2Df_xx};

printf(" f(%.3f) = %.3f = %.3f \n",a, f(a), Derivate[0](f,a,0));

printf(" f'(%.3f) = %.3f = %.3f \n",a,Dx_1Df_x (f,a,h),Derivate[1](f,a,h));

printf("f''(%.3f) = %.3f = %.3f \n",a,Dx_2Df_xx(f,a,h),Derivate[2](f,a,h));

printf(" g(%.3f) = %.3f = %.3f \n",a, g(a), Derivate[0](g,a,0));

printf(" g'(%.3f) = %.3f = %.3f \n",a,Dx_1Df_x (g,a,h),Derivate[1](g,a,h));

printf("g''(%.3f) = %.3f = %.3f \n",a,Dx_2Df_xx(g,a,h),Derivate[2](g,a,h));