#include <curses.h>int
chgat(int n, attr_t attr, short color, const void *opts);
int
wchgat(WINDOW *win, int n, attr_t attr, short color, const void *opts);
int
mvchgat(int y, int x, int n, attr_t attr, short color, const void *opts);
int
mvwchgat(WINDOW *win, int y, int x, int n, attr_t attr, short color, const void *opts);