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v4.1
test/knight.c
565 строк
14 KB
Thomas E. Dickey
ncurses 4.1
15 май 1997, 08:00
15 май 1997, 08:00
3a9b6a3
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/* * Knight's Tour - a brain game * * The original of this game was anonymous. It had an unbelievably bogus * interface, you actually had to enter square coordinates! Redesign by * Eric S. Raymond <esr@snark.thyrsus.com> July 22 1995. Mouse support * added September 20th 1995. * * $Id: knight.c,v 1.13 1997/01/19 00:55:17 tom Exp $ */ #include <test.priv.h> #include <ctype.h> #include <signal.h> #include <string.h> /* board size */ #define BDEPTH 8 #define BWIDTH 8 /* where to start the instructions */ #define INSTRY 2 #define INSTRX 35 /* corner of board */ #define BOARDY 2 #define BOARDX 0 /* notification line */ #define NOTIFYY 21 /* virtual color values */ #define TRAIL_COLOR 1 #define PLUS_COLOR 2 #define MINUS_COLOR 3 #define CX(x) (2 + 4 * (x)) #define CY(y) (1 + 2 * (y)) #define cellmove(y, x) wmove(boardwin, CY(y), CX(x)) #define CXINV(x) (((x) - 1) / 4) #define CYINV(y) (((y) - 2) / 2) typedef struct { short x, y; } cell; static short board[BDEPTH][BWIDTH]; /* the squares */ static int rw,col; /* current row and column */ static int lastrow,lastcol; /* last location visited */ static cell history[BDEPTH*BWIDTH]; /* choice history */ static int movecount; /* count of moves so far */ static WINDOW *boardwin; /* the board window */ static WINDOW *helpwin; /* the help window */ static WINDOW *msgwin; /* the message window */ static chtype trail = '#'; /* trail character */ static chtype plus = '+'; /* cursor hot-spot character */ static chtype minus = '-'; /* possible-move character */ static chtype oldch; static void init(void); static void play(void); static void dosquares(void); static void drawmove(char, int, int, int, int); static bool evalmove(int, int); static bool chkmoves(void); static bool chksqr(int, int); static int iabs(int); int main( int argc GCC_UNUSED, char *argv[] GCC_UNUSED) { init(); play(); endwin(); return EXIT_SUCCESS; } static void init (void) { srand ((unsigned)getpid()); initscr (); cbreak (); /* immediate char return */ noecho (); /* no immediate echo */ boardwin = newwin(BDEPTH * 2 + 1, BWIDTH * 4 + 1, BOARDY, BOARDX); helpwin = newwin(0, 0, INSTRY, INSTRX); msgwin = newwin(1, INSTRX-1, NOTIFYY, 0); scrollok(msgwin, TRUE); keypad(boardwin, TRUE); if (has_colors()) { int bg = COLOR_BLACK; start_color(); #ifdef NCURSES_VERSION if (use_default_colors() == OK) bg = -1; #endif (void) init_pair(TRAIL_COLOR, COLOR_CYAN, bg); (void) init_pair(PLUS_COLOR, COLOR_RED, bg); (void) init_pair(MINUS_COLOR, COLOR_GREEN, bg); trail |= COLOR_PAIR(TRAIL_COLOR); plus |= COLOR_PAIR(PLUS_COLOR); minus |= COLOR_PAIR(MINUS_COLOR); } #ifdef NCURSES_MOUSE_VERSION (void) mousemask(BUTTON1_CLICKED, (mmask_t *)NULL); #endif /* NCURSES_MOUSE_VERSION*/ oldch = minus; } static void help1(void) /* game explanation -- initial help screen */ { (void)waddstr(helpwin, "Knight's move is a solitaire puzzle. Your\n"); (void)waddstr(helpwin, "objective is to visit each square of the \n"); (void)waddstr(helpwin, "chessboard exactly once by making knight's\n"); (void)waddstr(helpwin, "moves (one square right or left followed \n"); (void)waddstr(helpwin, "by two squares up or down, or two squares \n"); (void)waddstr(helpwin, "right or left followed by one square up or\n"); (void)waddstr(helpwin, "down). You may start anywhere.\n\n"); (void)waddstr(helpwin, "Use arrow keys to move the cursor around.\n"); (void)waddstr(helpwin, "When you want to move your knight to the \n"); (void)waddstr(helpwin, "cursor location, press <space> or Enter.\n"); (void)waddstr(helpwin, "Illegal moves will be rejected with an \n"); (void)waddstr(helpwin, "audible beep.\n\n"); (void)waddstr(helpwin, "The program will detect if you solve the\n"); (void)waddstr(helpwin, "puzzle; also inform you when you run out\n"); (void)waddstr(helpwin, "of legal moves.\n\n"); (void)mvwaddstr(helpwin, NOTIFYY-INSTRY, 0, "Press `?' to go to keystroke help."); } static void help2(void) /* keystroke help screen */ { (void)waddstr(helpwin, "Possible moves are shown with `-'.\n\n"); (void)waddstr(helpwin, "You can move around with the arrow keys or\n"); (void)waddstr(helpwin, "with the rogue/hack movement keys. Other\n"); (void)waddstr(helpwin, "commands allow you to undo moves or redraw.\n"); (void)waddstr(helpwin, "Your mouse may work; try left-button to\n"); (void)waddstr(helpwin, "move to the square under the pointer.\n\n"); (void)waddstr(helpwin, "x,q -- exit y k u 7 8 9\n"); (void)waddstr(helpwin, "r -- redraw screen \\|/ \\|/ \n"); (void)waddstr(helpwin, "u -- undo move h-+-l 4-+-6\n"); (void)waddstr(helpwin, " /|\\ /|\\ \n"); (void)waddstr(helpwin, " b j n 1 2 3\n"); (void)waddstr(helpwin,"\nYou can place your knight on the selected\n"); (void)waddstr(helpwin, "square with spacebar, Enter, or the keypad\n"); (void)waddstr(helpwin, "center key. You can quit with `x' or `q'.\n"); (void)mvwaddstr(helpwin, NOTIFYY-INSTRY, 0, "Press `?' to go to game explanation"); } static void play (void) /* play the game */ { bool keyhelp; /* TRUE if keystroke help is up */ int c, ny = 0, nx = 0; int i, j, count; do { /* clear screen and draw board */ werase(boardwin); werase(helpwin); werase(msgwin); dosquares(); help1(); wnoutrefresh(stdscr); wnoutrefresh(helpwin); wnoutrefresh(msgwin); wnoutrefresh(boardwin); doupdate(); for (i = 0; i < BDEPTH; i++) for (j = 0; j < BWIDTH; j++) { board[i][j] = FALSE; cellmove(i, j); waddch(boardwin, minus); } memset(history, '\0', sizeof(history)); history[0].y = history[0].x = -1; lastrow = lastcol = -2; movecount = 1; keyhelp = FALSE; for (;;) { if (rw != lastrow || col != lastcol) { if (lastrow >= 0 && lastcol >= 0) { cellmove(lastrow, lastcol); if (board[lastrow][lastcol]) waddch(boardwin, trail); else waddch(boardwin, oldch); } cellmove(rw, col); oldch = winch(boardwin); lastrow = rw; lastcol= col; } cellmove(rw, col); waddch(boardwin, plus); cellmove(rw, col); wrefresh(msgwin); c = wgetch(boardwin); werase(msgwin); switch (c) { case 'k': case '8': case KEY_UP: ny = rw+BDEPTH-1; nx = col; break; case 'j': case '2': case KEY_DOWN: ny = rw+1; nx = col; break; case 'h': case '4': case KEY_LEFT: ny = rw; nx = col+BWIDTH-1; break; case 'l': case '6': case KEY_RIGHT: ny = rw; nx = col+1; break; case 'y': case '7': case KEY_A1: ny = rw+BDEPTH-1; nx = col+BWIDTH-1; break; case 'b': case '1': case KEY_C1: ny = rw+1; nx = col+BWIDTH-1; break; case 'u': case '9': case KEY_A3: ny = rw+BDEPTH-1; nx = col+1; break; case 'n': case '3': case KEY_C3: ny = rw+1; nx = col+1; break; #ifdef NCURSES_MOUSE_VERSION case KEY_MOUSE: { MEVENT myevent; getmouse(&myevent); if (myevent.y >= CY(0) && myevent.y <= CY(BDEPTH) && myevent.x >= CX(0) && myevent.x <= CX(BWIDTH)) { nx = CXINV(myevent.x); ny = CYINV(myevent.y); ungetch('\n'); break; } else { beep(); continue; } } #endif /* NCURSES_MOUSE_VERSION */ case KEY_B2: case '\n': case ' ': if (evalmove(rw, col)) { drawmove(trail, history[movecount-1].y, history[movecount-1].x, rw, col); history[movecount].y = rw; history[movecount].x = col; movecount++; if (!chkmoves()) goto dropout; } else beep(); break; case KEY_REDO: case '\f': case 'r': clearok(curscr, TRUE); wnoutrefresh(stdscr); wnoutrefresh(boardwin); wnoutrefresh(msgwin); wnoutrefresh(helpwin); doupdate(); break; case KEY_UNDO: case KEY_BACKSPACE: case '\b': if (movecount == 1) { ny = lastrow; nx = lastcol; waddstr(msgwin, "\nNo previous move."); beep(); } else { int oldy = history[movecount-1].y; int oldx = history[movecount-1].x; board[oldy][oldx] = FALSE; --movecount; ny = history[movecount-1].y; nx = history[movecount-1].x; drawmove(' ', oldy, oldx, ny, nx); /* avoid problems if we just changed the current cell */ cellmove(lastrow, lastcol); oldch = winch(boardwin); } break; case 'q': case 'x': goto dropout; case '?': werase(helpwin); if (keyhelp) { help1(); keyhelp = FALSE; } else { help2(); keyhelp = TRUE; } wrefresh(helpwin); break; default: beep(); break; } col = nx % BWIDTH; rw = ny % BDEPTH; } dropout: count = 0; for (i = 0; i < BDEPTH; i++) for (j = 0; j < BWIDTH; j++) if (board[i][j] != 0) count += 1; if (count == (BWIDTH * BDEPTH)) wprintw(msgwin, "\nYou won. Care to try again? "); else wprintw(msgwin, "\n%d squares filled. Try again? ", count); } while (tolower(wgetch(msgwin)) == 'y'); } static void dosquares (void) { int i, j; mvaddstr(0, 20, "KNIGHT'S MOVE -- a logical solitaire"); move(BOARDY,BOARDX); waddch(boardwin, ACS_ULCORNER); for (j = 0; j < 7; j++) { waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_TTEE); } waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_URCORNER); for (i = 1; i < BDEPTH; i++) { move(BOARDY + i * 2 - 1, BOARDX); waddch(boardwin, ACS_VLINE); for (j = 0; j < BWIDTH; j++) { waddch(boardwin, ' '); waddch(boardwin, ' '); waddch(boardwin, ' '); waddch(boardwin, ACS_VLINE); } move(BOARDY + i * 2, BOARDX); waddch(boardwin, ACS_LTEE); for (j = 0; j < BWIDTH - 1; j++) { waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_PLUS); } waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_RTEE); } move(BOARDY + i * 2 - 1, BOARDX); waddch(boardwin, ACS_VLINE); for (j = 0; j < BWIDTH; j++) { waddch(boardwin, ' '); waddch(boardwin, ' '); waddch(boardwin, ' '); waddch(boardwin, ACS_VLINE); } move(BOARDY + i * 2, BOARDX); waddch(boardwin, ACS_LLCORNER); for (j = 0; j < BWIDTH - 1; j++) { waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_BTEE); } waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_HLINE); waddch(boardwin, ACS_LRCORNER); } static void mark_possibles(int prow, int pcol, chtype mark) { if (chksqr(prow+2,pcol+1)){cellmove(prow+2,pcol+1);waddch(boardwin,mark);}; if (chksqr(prow+2,pcol-1)){cellmove(prow+2,pcol-1);waddch(boardwin,mark);}; if (chksqr(prow-2,pcol+1)){cellmove(prow-2,pcol+1);waddch(boardwin,mark);}; if (chksqr(prow-2,pcol-1)){cellmove(prow-2,pcol-1);waddch(boardwin,mark);}; if (chksqr(prow+1,pcol+2)){cellmove(prow+1,pcol+2);waddch(boardwin,mark);}; if (chksqr(prow+1,pcol-2)){cellmove(prow+1,pcol-2);waddch(boardwin,mark);}; if (chksqr(prow-1,pcol+2)){cellmove(prow-1,pcol+2);waddch(boardwin,mark);}; if (chksqr(prow-1,pcol-2)){cellmove(prow-1,pcol-2);waddch(boardwin,mark);}; } static void drawmove(char tchar, int oldy, int oldx, int row, int column) /* place the stars, update board & currents */ { if (movecount <= 1) { int i, j; for (i = 0; i < BDEPTH; i++) for (j = 0; j < BWIDTH; j++) { cellmove(i, j); if (winch(boardwin) == minus) waddch(boardwin, movecount ? ' ' : minus); } } else { cellmove(oldy, oldx); waddch(boardwin, '\b'); waddch(boardwin, tchar); waddch(boardwin, tchar); waddch(boardwin, tchar); mark_possibles(oldy, oldx, ' '); } if (row != -1 && column != -1) { cellmove(row, column); waddch(boardwin, '\b'); waddch(boardwin, trail); waddch(boardwin, trail); waddch(boardwin, trail); mark_possibles(row, column, minus); board[row][column] = TRUE; } wprintw(msgwin, "\nMove %d", movecount); } static bool evalmove(int row, int column) /* evaluate move */ { if (movecount == 1) return(TRUE); else if (board[row][column] == TRUE) { waddstr(msgwin, "\nYou've already been there."); return(FALSE); } else { int rdif = iabs(row - history[movecount-1].y); int cdif = iabs(column - history[movecount-1].x); if (!((rdif == 1) && (cdif == 2)) && !((rdif == 2) && (cdif == 1))) { waddstr(msgwin, "\nThat's not a legal knight's move."); return(FALSE); } } return(TRUE); } static bool chkmoves (void) /* check to see if valid moves are available */ { if (chksqr(rw+2,col+1)) return(TRUE); if (chksqr(rw+2,col-1)) return(TRUE); if (chksqr(rw-2,col+1)) return(TRUE); if (chksqr(rw-2,col-1)) return(TRUE); if (chksqr(rw+1,col+2)) return(TRUE); if (chksqr(rw+1,col-2)) return(TRUE); if (chksqr(rw-1,col+2)) return(TRUE); if (chksqr(rw-1,col-2)) return(TRUE); return (FALSE); } static int iabs(int num) { if (num < 0) return (-num); else return (num); } static bool chksqr (int r1, int c1) { if ((r1 < 0) || (r1 > BDEPTH - 1)) return(FALSE); if ((c1 < 0) || (c1 > BWIDTH - 1)) return(FALSE); return (!board[r1][c1]); } /* knight.c ends here */