demo_fn.h

来自「GNU的数值运算库,内容丰富!」· C头文件 代码 · 共 10 行

struct quadratic_params
  {
    double a, b, c;
  };

double quadratic (double x, void *params);
double quadratic_deriv (double x, void *params);
void quadratic_fdf (double x, void *params, 
                    double *y, double *dy);