f___3.h

来自「c源码」· C头文件 代码 · 共 23 行

/*         .h                     freeware                   [e-mail]*/

/* ------------------------------------- FUNCTION --------------------------  */
/* Do    :                                                                    */
/*                                                                            */
/* -------------------------------------------------------------------------- */
double f(
double x)
{
 return(       sqrt(x));
}
char  feq[] = " sqrt(x)";
/* -------------------------------------------------------------------------- */
double Df(
double x)
{
 return(  (1.0/2.0) * (1.0/(sqrt(x))) );
}
char Dfeq[] = " (1.0/2.0)*(1.0/(sqrt(x)))";
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */