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| #include <iostream>
#include <iomanip>
#include <cstdlib>
#include <cstdio>
#include <ctime>
#include <cctype>
#include <cmath>
#include <vector>
using namespace std;
//такие значения, чтобы можно было вернуть все возможные ходы одним числом
enum moves {UP = 0b1000, DOWN = 0b0100, LEFT = 0b0010, RIGHT = 0b0001};
enum status {PLAYING, WIN, MENU, QUIT};
typedef struct {
moves move; // на самом деле поле не используется, но висит тут, чтобы не запутаться
struct {
int dx;
int dy;
};
} movetypes;
typedef struct {
int x;
int y;
} pos;
pos posfree; // тут хранится текущее положение пустой ячейки, чтобы не искать каждый раз. Реально в ней находится значение 16
movetypes mvt[] = {{UP, {-1, 0}},
{DOWN, { 1, 0}},
{LEFT, { 0, -1}},
{RIGHT, { 0, 1}}};
pos & operator+=(pos & pf, const movetypes & trymove) {
pf.x += trymove.dx;
pf.y += trymove.dy;
return pf;
}
pos operator+(const pos & posfrom, const moves& move) {
pos ret = posfrom;
switch(move) {
case UP:
ret += mvt[0];
break;
case DOWN:
ret += mvt[1];
break;
case LEFT:
ret += mvt[2];
break;
case RIGHT:
ret += mvt[3];
break;
}
return ret;
}
vector <int> board[4];
void boardinit() {
for(int x = 0; x < 4; ++x) {
board[x].clear();
for(int y = 0; y < 4; ++y)
board[x].push_back(1 + x*4 + y);
}
posfree.x = 3;
posfree.y = 3;
}
void showboard() {
for(int i = 0; i < 4; ++i) {
fputs("\n+----+----+----+----+\n|", stdout);
for(int j = 0; j < 4; ++j) {
if(board[i][j] == 16)
fputs(" |", stdout);
else
printf(" %2d |", board[i][j]);
}
}
puts("\n+----+----+----+----+");
}
bool isvalidpos(pos ps) {
return ((ps.x >= 0) && (ps.x <= 3) &&
(ps.y >= 0) && (ps.y <= 3));
}
int getpossiblemoves() {
int ret = 0;
if(isvalidpos(posfree + UP)) ret |= UP;
if(isvalidpos(posfree + DOWN)) ret |= DOWN;
if(isvalidpos(posfree + LEFT)) ret |= LEFT;
if(isvalidpos(posfree + RIGHT)) ret |= RIGHT;
return ret;
}
moves getrandmove() {
int possiblemoves = getpossiblemoves();
moves mvs[4];
int npm = 0;
if (possiblemoves & UP){
mvs[npm] = UP;
++npm;
}
if (possiblemoves & DOWN){
mvs[npm] = DOWN;
++npm;
}
if (possiblemoves & LEFT){
mvs[npm] = LEFT;
++npm;
}
if (possiblemoves & RIGHT){
mvs[npm] = RIGHT;
++npm;
}
int moveint = rand() % npm;
return mvs[moveint];
}
status checkwin() {
for(int x = 0; x < 4; ++x) {
board[x].clear();
for(int y = 0; y < 4; ++y) {
if(board[x][y] != (1 + x*4 + y))
return PLAYING;
}
}
return WIN;
}
status makemove(moves move) {
pos from = posfree;
pos to = posfree + move;
if(isvalidpos(to) == false)
return PLAYING;
int tmp = board[from.x][from.y];
board[from.x][from.y] = board[to.x][to.y];
board[to.x][to.y] = tmp;
posfree = to;
return checkwin();
}
void shuffle(int level) {
while(level-- > 0)
makemove(getrandmove());
}
status playing() {
char msg;
moves currentmove;
while(true) {
showboard();
cin >> msg;
msg = tolower(msg);
switch(msg) {
case 'q':
return QUIT;
case 'm': case 'n':
return MENU;
case 'w': case '8':
currentmove = UP;
break;
case 's': case '2':
currentmove = DOWN;
break;
case 'a': case '4':
currentmove = LEFT;
break;
case 'd': case '6':
currentmove = RIGHT;
break;
default:
cout << "Wrong input: " << msg;
continue;
}
if(makemove(currentmove) == WIN) {
puts("WIN!");
return WIN;
}
}
}
void gameloop() {
srand(time(0));
cin.exceptions(ios::failbit | ios::badbit);
int level;
while(true) { // main loop
boardinit();
fputs("New game: input level: ", stdout);
while(true){ // input level
try { // весь этот выпендреж, чтобы попробовать try..carth
cin >> level;
if(level < 1) {
fputs("\nLevel must be > 0: Input level: ", stdout);
continue;
}
break;
}
catch (istream::failure &e) {
fputs("\nNaN: Input level: ", stdout);
cin.clear();
cin.ignore(1024, '\n');
}
}
shuffle(level);
if (playing() == QUIT)
return;
}
}
int main() {
gameloop();
return 0;
} |
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