Kharec/drop4
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refactor: rename variable identifiers for clarity

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Sandro CURY CAZZANIGA
2026-01-05 13:33:16 +01:00
parent 5eb3a48045
commit 70d34b73ec
1 changed files with 44 additions and 41 deletions
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85
drop4.c
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@@ -6,7 +6,7 @@
#include <string.h> #include <string.h>
#define ROWS 6 #define ROWS 6
#define COLS 7 #define COLUMNS 7
#define EMPTY 0 #define EMPTY 0
#define P1 1 #define P1 1
#define P2 2 #define P2 2
@@ -14,31 +14,31 @@
#define NUM_DIRECTIONS 4 #define NUM_DIRECTIONS 4
typedef struct { typedef struct {
int board[ROWS][COLS]; int board[ROWS][COLUMNS];
int current_player; int current_player;
int last_row; int last_row;
int last_col; int last_column;
} Game; } Game;
void init_game(Game *game) { void init_game(Game *game) {
for (int i = 0; i < ROWS; i++) { for (int i = 0; i < ROWS; i++) {
for (int j = 0; j < COLS; j++) { for (int j = 0; j < COLUMNS; j++) {
game->board[i][j] = EMPTY; game->board[i][j] = EMPTY;
} }
} }
game->current_player = P1; game->current_player = P1;
game->last_row = -1; game->last_row = -1;
game->last_col = -1; game->last_column = -1;
} }
void print_board(Game *game) { void print_board(Game *game) {
printf("\n"); printf("\n");
for (int j = 0; j < COLS; j++) { for (int j = 0; j < COLUMNS; j++) {
printf(" %d ", j); printf(" %d ", j);
} }
printf("\n"); printf("\n");
for (int i = 0; i < ROWS; i++) { for (int i = 0; i < ROWS; i++) {
for (int j = 0; j < COLS; j++) { for (int j = 0; j < COLUMNS; j++) {
char symbol = game->board[i][j] == EMPTY ? '.' char symbol = game->board[i][j] == EMPTY ? '.'
: game->board[i][j] == P1 ? 'X' : game->board[i][j] == P1 ? 'X'
: 'O'; : 'O';
@@ -53,51 +53,53 @@ void switch_player(Game *game) {
game->current_player = game->current_player == P1 ? P2 : P1; game->current_player = game->current_player == P1 ? P2 : P1;
} }
int drop_piece(Game *game, int col) { int drop_piece(Game *game, int column) {
for (int i = ROWS - 1; i >= 0; i--) { for (int i = ROWS - 1; i >= 0; i--) {
if (game->board[i][col] == EMPTY) { if (game->board[i][column] == EMPTY) {
game->board[i][col] = game->current_player; game->board[i][column] = game->current_player;
game->last_row = i; game->last_row = i;
game->last_col = col; game->last_column = column;
return 1; return 1;
} }
} }
return 0; return 0;
} }
int is_valid_move(Game *game, int col) { int is_valid_move(Game *game, int column) {
return col >= 0 && col < COLS && game->board[0][col] == EMPTY; return column >= 0 && column < COLUMNS && game->board[0][column] == EMPTY;
} }
int is_winning_move(Game *game) { int is_winning_move(Game *game) {
if (game->last_row < 0 || game->last_col < 0) { if (game->last_row < 0 || game->last_column < 0) {
return 0; return 0;
} }
int row = game->last_row; int row = game->last_row;
int col = game->last_col; int column = game->last_column;
int player = game->board[row][col]; int player = game->board[row][column];
const int directions[NUM_DIRECTIONS][2] = {{0, 1}, {1, 0}, {1, 1}, {1, -1}}; const int directions[NUM_DIRECTIONS][2] = {{0, 1}, {1, 0}, {1, 1}, {1, -1}};
for (int dir = 0; dir < NUM_DIRECTIONS; dir++) { for (int direction = 0; direction < NUM_DIRECTIONS; direction++) {
int count = 1; int count = 1;
for (int offset = 1; offset < WIN_LENGTH; offset++) { for (int offset = 1; offset < WIN_LENGTH; offset++) {
int new_row = row + directions[dir][0] * offset; int new_row = row + directions[direction][0] * offset;
int new_col = col + directions[dir][1] * offset; int new_column = column + directions[direction][1] * offset;
if (new_row < 0 || new_row >= ROWS || new_col < 0 || new_col >= COLS) if (new_row < 0 || new_row >= ROWS || new_column < 0 ||
new_column >= COLUMNS)
break; break;
if (game->board[new_row][new_col] != player) if (game->board[new_row][new_column] != player)
break; break;
count++; count++;
} }
if (count >= WIN_LENGTH) if (count >= WIN_LENGTH)
return 1; return 1;
for (int offset = 1; offset < WIN_LENGTH; offset++) { for (int offset = 1; offset < WIN_LENGTH; offset++) {
int new_row = row - directions[dir][0] * offset; int new_row = row - directions[direction][0] * offset;
int new_col = col - directions[dir][1] * offset; int new_column = column - directions[direction][1] * offset;
if (new_row < 0 || new_row >= ROWS || new_col < 0 || new_col >= COLS) if (new_row < 0 || new_row >= ROWS || new_column < 0 ||
new_column >= COLUMNS)
break; break;
if (game->board[new_row][new_col] != player) if (game->board[new_row][new_column] != player)
break; break;
count++; count++;
if (count >= WIN_LENGTH) if (count >= WIN_LENGTH)
@@ -108,7 +110,7 @@ int is_winning_move(Game *game) {
} }
int is_board_full(Game *game) { int is_board_full(Game *game) {
for (int j = 0; j < COLS; j++) { for (int j = 0; j < COLUMNS; j++) {
if (game->board[0][j] == EMPTY) if (game->board[0][j] == EMPTY)
return 0; return 0;
} }
@@ -154,11 +156,11 @@ static int is_quit_command(const char *str) {
} }
int get_column_input(Game *game) { int get_column_input(Game *game) {
int col; int column;
char buffer[64]; char buffer[64];
while (1) { while (1) {
printf("Player %d, enter a column (0-%d) or 'q' to quit: ", printf("Player %d, enter a column (0-%d) or 'q' to quit: ",
game->current_player, COLS - 1); game->current_player, COLUMNS - 1);
if (fgets(buffer, sizeof(buffer), stdin) == NULL) { if (fgets(buffer, sizeof(buffer), stdin) == NULL) {
return -1; return -1;
} }
@@ -169,7 +171,7 @@ int get_column_input(Game *game) {
while ((c = getchar()) != '\n' && c != EOF) while ((c = getchar()) != '\n' && c != EOF)
; ;
printf("Error: Input too long. Please enter a number between 0 and %d.\n", printf("Error: Input too long. Please enter a number between 0 and %d.\n",
COLS - 1); COLUMNS - 1);
continue; continue;
} }
@@ -184,14 +186,14 @@ int get_column_input(Game *game) {
if (errno == ERANGE || col_long < INT_MIN || col_long > INT_MAX) { if (errno == ERANGE || col_long < INT_MIN || col_long > INT_MAX) {
printf( printf(
"Error: Number too large. Please enter a number between 0 and %d.\n", "Error: Number too large. Please enter a number between 0 and %d.\n",
COLS - 1); COLUMNS - 1);
continue; continue;
} }
if (endptr == buffer) { if (endptr == buffer) {
printf("Error: Invalid input. Please enter a number between 0 and %d, or " printf("Error: Invalid input. Please enter a number between 0 and %d, or "
"'q' to quit.\n", "'q' to quit.\n",
COLS - 1); COLUMNS - 1);
continue; continue;
} }
@@ -202,25 +204,26 @@ int get_column_input(Game *game) {
if (*endptr != '\0') { if (*endptr != '\0') {
printf("Error: Invalid characters after number. Please enter only a " printf("Error: Invalid characters after number. Please enter only a "
"number between 0 and %d.\n", "number between 0 and %d.\n",
COLS - 1); COLUMNS - 1);
continue; continue;
} }
col = (int)col_long; column = (int)col_long;
if (col < 0 || col >= COLS) { if (column < 0 || column >= COLUMNS) {
printf("Error: Column %d is out of range. Please enter a number between " printf("Error: Column %d is out of range. Please enter a number between "
"0 and %d.\n", "0 and %d.\n",
col, COLS - 1); column, COLUMNS - 1);
continue; continue;
} }
if (!is_valid_move(game, col)) { if (!is_valid_move(game, column)) {
printf("Error: Column %d is full. Please choose another column.\n", col); printf("Error: Column %d is full. Please choose another column.\n",
column);
continue; continue;
} }
return col; return column;
} }
} }
@@ -230,13 +233,13 @@ int main() {
print_board(&game); print_board(&game);
while (1) { while (1) {
int col = get_column_input(&game); int column = get_column_input(&game);
if (col < 0) { if (column < 0) {
printf("\nGame interrupted.\n"); printf("\nGame interrupted.\n");
break; break;
} }
drop_piece(&game, col); drop_piece(&game, column);
print_board(&game); print_board(&game);
if (is_winning_move(&game)) { if (is_winning_move(&game)) {
printf("Player %d wins!\n", game.current_player); printf("Player %d wins!\n", game.current_player);