mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
321 lines
7.3 KiB
C
321 lines
7.3 KiB
C
/* Knights Tour - a brain game */
|
|
|
|
#include <ncurses.h>
|
|
#include <signal.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
|
|
#ifdef __FreeBSD__
|
|
#define srand48 srandom
|
|
#define lrand48 random
|
|
#endif
|
|
|
|
short board [64]; /* the squares */
|
|
char row, column; /* input characters */
|
|
int rw,col; /* numeric equivalent of row and column */
|
|
int curow,curcol; /* current row and column integers */
|
|
int rdif, cdif; /* difference between input and current */
|
|
int j; /* index into board */
|
|
|
|
char script[]={"'_)//,/(-)/__/__(_<_(__),|/|/_///_/_<//_/_)__o__o'______///_(--_(_)___,(_/,_/__(_\0"};
|
|
|
|
int ypos[] ={1,0,1,2,3,0,1,2,2,3,3,2,2,3,2,2,3,3,3,3,3,2,3,3,2,4,5,5,
|
|
4,3,3,2,1,2,3,3,3,2,1,3,3,2,3,3,3,2,1,1,0,1,4,4,4,4,4,4,5,6,7,7,
|
|
7,6,6,6,7,7,7,6,6,6,6,7,7,7,6,7,7,6,6,7,7};
|
|
|
|
int xpos[]={0,1,2,1,0,5,4,3,2,4,6,7,8,8,9,10,10,11,12,13,14,15,15,16,
|
|
16,16,15,14,15,17,18,19,20,20,20,21,22,23,24,23,25,26,27,26,28,
|
|
13,23,25,27,27,2,3,4,5,6,7,4,3,2,1,0,1,2,5,4,5,6,6,7,8,9,8,9,10,
|
|
11,11,12,13,14,14,15};
|
|
|
|
static char *instructions[] =
|
|
{
|
|
" Knight's Tour is a board game for one player. It is played on",
|
|
"an eight by eight board and is based on the allowable moves that a knight",
|
|
"can make in the game of chess. For those who are unfamiliar with the",
|
|
"game, a knight may move either on a row or a column but not diagonally.",
|
|
"He may move one square in any direction and two squares in a perpendicular",
|
|
"direction >or< two squares in any direction and one square in a",
|
|
"perpendicular direction. He may not, of course, move off the board.",
|
|
"",
|
|
" At the beginning of a game you will be asked to either choose a",
|
|
"starting square or allow the computer to select a random location.",
|
|
"Squares are designated by a letter-number combination where the row is",
|
|
"specified by a letter A-H and the numbers 1-8 define a column. Invalid",
|
|
"entries are ignored and illegal moves produce a beep at the terminal.",
|
|
"",
|
|
" The objective is to visit every square on the board. When you claim",
|
|
"a square a marker is placed on it to show where you've been. You may",
|
|
"not revisit a square that you've landed on before.",
|
|
"",
|
|
" After each move the program checks to see if you have any legal",
|
|
"moves left. If not, the game ends and your squares are counted. If",
|
|
"you've made all the squares you win the game. Otherwise, you are told",
|
|
"the number of squares you did make.",
|
|
"END"
|
|
};
|
|
|
|
void init(void);
|
|
int play(void);
|
|
void drawboard(void);
|
|
void dosquares(void);
|
|
void getfirst(void);
|
|
void getrc(void);
|
|
void putstars(void);
|
|
int evalmove(void);
|
|
int chkmoves(void);
|
|
int endgame(void);
|
|
int chksqr(int, int);
|
|
void instruct(void);
|
|
void title(int, int);
|
|
|
|
int
|
|
main ()
|
|
{
|
|
init ();
|
|
for (;;)
|
|
if (!play ()) {
|
|
endwin ();
|
|
exit (0);
|
|
}
|
|
}
|
|
|
|
void
|
|
init ()
|
|
{
|
|
|
|
srand48 (getpid());
|
|
initscr ();
|
|
cbreak (); /* immediate char return */
|
|
noecho (); /* no immediate echo */
|
|
title (1,23);
|
|
mvaddstr (23, 25, "Would you like instructions? ");
|
|
refresh();
|
|
if ((toupper(getch())) == 'Y')
|
|
instruct();
|
|
clear ();
|
|
}
|
|
|
|
int
|
|
play ()
|
|
{
|
|
drawboard (); /* clear screen and drawboard */
|
|
for (j = 0; j < 64; j++) board[j]=0;
|
|
getfirst (); /* get the starting square */
|
|
for (;;) {
|
|
getrc();
|
|
if (evalmove()) {
|
|
putstars ();
|
|
if (!chkmoves())
|
|
return (endgame ());
|
|
}
|
|
else beep();
|
|
}
|
|
}
|
|
|
|
void
|
|
drawboard ()
|
|
{
|
|
erase ();
|
|
dosquares ();
|
|
refresh ();
|
|
mvaddstr (0, 7, "1 2 3 4 5 6 7 8");
|
|
for (j = 0; j < 8; j++) mvaddch (2*j+2, 3, j + 'A');
|
|
refresh ();
|
|
mvaddstr (20, 5, "ROW:");
|
|
mvaddstr (20, 27, "COLUMN:");
|
|
mvaddstr (14, 49, "CURRENT ROW");
|
|
mvaddstr (16, 49, "CURRENT COL");
|
|
mvaddstr (22, 5, "A - H or Q to quit");
|
|
mvaddstr (22, 27, "1 - 8 or ESC to cancel row");
|
|
refresh ();
|
|
title (1,40);
|
|
}
|
|
|
|
void
|
|
dosquares ()
|
|
{
|
|
mvaddstr (1, 6, "-------------------------------");
|
|
for (j = 1; j < 9; j++){
|
|
mvaddstr (2*j, 5, "| | | | | | | | |");
|
|
mvaddstr (2*j+1, 6, "-------------------------------");
|
|
}
|
|
}
|
|
|
|
void
|
|
getfirst () /* get first square */
|
|
{
|
|
mvaddstr (23, 25, "(S)elect or (R)andom "); refresh ();
|
|
do {
|
|
row = toupper(getch());
|
|
} while ((row != 'S') && (row != 'R'));
|
|
if (row == 'R') {
|
|
rw = lrand48() % 8;
|
|
col = lrand48() % 8;
|
|
j = 8* rw + col;
|
|
row = rw + 'A';
|
|
column = col + '1';
|
|
}
|
|
else {
|
|
mvaddstr (23, 25, "Enter starting row and column");
|
|
refresh ();
|
|
getrc(); /* get row and column */
|
|
}
|
|
putstars ();
|
|
move (23, 0);
|
|
clrtobot();
|
|
}
|
|
|
|
void
|
|
getrc () /* get row and column */
|
|
{
|
|
noecho ();
|
|
do {
|
|
mvaddstr (20, 35, " ");
|
|
refresh ();
|
|
do {
|
|
mvaddch (20, 11, ' ');
|
|
move (20, 11);
|
|
refresh ();
|
|
row=toupper(getch());
|
|
if (row == 'Q') {
|
|
endwin ();
|
|
exit (1);
|
|
}
|
|
} while ((row < 'A') || (row > 'H'));
|
|
addch (row);
|
|
move (20, 35);
|
|
refresh ();
|
|
do {
|
|
column=getch();
|
|
if (column == '\033') break;
|
|
} while ((column < '1') || (column > '8'));
|
|
if (column != '\033') addch (column);
|
|
} while (column == '\033');
|
|
refresh();
|
|
rw = row - 'A';
|
|
col= column - '1';
|
|
j = 8 * rw + col;
|
|
}
|
|
|
|
void
|
|
putstars () /* place the stars, update board & currents */
|
|
{
|
|
mvaddch (2*curow+2, 38, ' ');
|
|
mvaddch (2*rw+2, 38, '<');
|
|
mvaddch (18, curcol*4+7, ' ');
|
|
mvaddch (18, col*4+7, '^');
|
|
curow = rw;
|
|
curcol= col;
|
|
mvaddstr (2 * rw + 2, 4*col+6, "***");
|
|
mvaddch (14, 61, row);
|
|
mvaddch (16, 61, column);
|
|
refresh ();
|
|
board[j] = 1;
|
|
}
|
|
|
|
int
|
|
evalmove() /* convert row and column to integers */
|
|
/* and evaluate move */
|
|
{
|
|
rdif = rw - curow;
|
|
cdif = col - curcol;
|
|
rdif = abs(rw - curow);
|
|
cdif = abs(col - curcol);
|
|
refresh ();
|
|
if ((rdif == 1) && (cdif == 2)) if (board [j] == 0) return (1);
|
|
if ((rdif == 2) && (cdif == 1)) if (board [j] == 0) return (1);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
chkmoves () /* check to see if valid moves are available */
|
|
{
|
|
if (chksqr(2,1)) return (1);
|
|
if (chksqr(2,-1)) return (1);
|
|
if (chksqr(-2,1)) return (1);
|
|
if (chksqr(-2,-1)) return (1);
|
|
if (chksqr(1,2)) return (1);
|
|
if (chksqr(1,-2)) return (1);
|
|
if (chksqr(-1,2)) return (1);
|
|
if (chksqr(-1,-2)) return (1);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
endgame () /* check for filled board or not */
|
|
{
|
|
rw = 0;
|
|
for (j = 0; j < 64; j++) if (board[j] != 0) rw+=1;
|
|
if (rw == 64) mvaddstr (20, 20, "Congratulations !! You got 'em all");
|
|
else mvprintw (20, 20, "You have ended up with %2d squares",rw);
|
|
mvaddstr (21, 25, "Play again ? (y/n) ");
|
|
refresh ();
|
|
if ((row=tolower(getch())) == 'y') return (1);
|
|
else return (0);
|
|
}
|
|
|
|
#ifndef abs
|
|
abs(num)
|
|
int num;
|
|
{
|
|
if (num < 0) return (-num);
|
|
else return (num);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
chksqr (int n1, int n2)
|
|
{
|
|
int r1, c1;
|
|
|
|
r1 = rw + n1;
|
|
c1 = col + n2;
|
|
if ((r1<0) || (r1>7)) return (0);
|
|
if ((c1<0) || (c1>7)) return (0);
|
|
if (board[r1*8+c1] == 0) return (1);
|
|
else return (0);
|
|
}
|
|
|
|
void
|
|
instruct()
|
|
{
|
|
int i;
|
|
|
|
clear ();
|
|
for (i=0;;i++) {
|
|
if ((strcmp(instructions[i],"END"))) mvaddstr (i, 0, instructions[i]);
|
|
else {
|
|
mvaddstr (23, 25, "Ready to play ? (y/n) ");
|
|
refresh();
|
|
if (toupper(getch()) == 'Y') {
|
|
clear ();
|
|
return;
|
|
} else {
|
|
clear ();
|
|
refresh ();
|
|
endwin ();
|
|
exit (0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
title (y,x)
|
|
int y,x;
|
|
{
|
|
char c;
|
|
|
|
j = 0;
|
|
do {
|
|
c = script[j];
|
|
if (c == 0) break ;
|
|
mvaddch (ypos[j]+y, xpos[j]+x, c);
|
|
j++;
|
|
} while (c != 0);
|
|
refresh ();
|
|
}
|
|
|
|
|