/* * Prototypes for libplot functions. */void rarc(double, double, double, double, double, double, double);void box(double, double, double, double);void cfill(char *);void circ(double, double, double);void closepl(void);void color(char *);void plotdisc(double, double, double);void dpoint(double, double);void erase(void);void fill(int [], double *[]);void frame(double, double, double, double);void grade(double);void idle(void);void plotline(double, double, double, double);void move(double, double);void openpl(char *);void parabola(double, double, double, double, double, double);void pen(char *);void plotpoly(int [], double *[]);void ppause(void);void ptype(char *);void range(double, double, double, double);void restore(void);void rmove(double, double);void rvec(double, double);void sbox(double, double, double, double);void splin(int, int [], double *[]);void text(char *);void vec(double, double);void save(void);char *whoami(void);void doublebuffer(void);