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snake_c

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Small snake game in C

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Jaglekon <58274093+Jaglekon@users.noreply.github.com>2026-03-21 11:44 UTC

2 files changed+139-0
snake
README.md+1
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1+<h1> TUI Snake in C </h1>
snake.c+138
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1+#include <unistd.h>
2+
3+#include <stdio.h>
4+#include <stdint.h>
5+#include <stdbool.h>
6+
7+#include <string.h>
8+
9+#include <termios.h>
10+
11+#define RIGHT_CODE 'C'
12+#define LEFT_CODE 'D'
13+#define UP_CODE 'A'
14+#define DOWN_CODE 'B'
15+
16+#define WIDTH 4
17+#define HEIGHT 4
18+
19+typedef enum {
20+ UP, DOWN, LEFT, RIGHT
21+} direction;
22+
23+typedef struct selected {
24+ uint8_t x;
25+ uint8_t y;
26+} selected;
27+
28+
29+void draw_board(selected square_selected);
30+
31+
32+int main() {
33+
34+ struct termios old, new;
35+
36+ tcgetattr(STDIN_FILENO, &old);
37+
38+ new = old;
39+
40+ new.c_lflag &= ~(ECHO | ICANON);
41+ new.c_cc[VMIN] = 0;
42+ new.c_cc[VTIME] = 1;
43+
44+ tcsetattr(STDIN_FILENO, TCSANOW, &new);
45+
46+
47+ selected square_selected = {0, 0};
48+
49+ draw_board(square_selected);
50+
51+ bool run = true;
52+
53+ while (run) {
54+
55+ char string[1000] = {};
56+ ssize_t n = read(STDIN_FILENO, string, sizeof(string) - 1);
57+
58+
59+ if (n > 0) {
60+ string[n] = '\0';
61+
62+ if (strlen(string) >= 3) {
63+ if (string[0] == '\033') {
64+ if (string[1] == '[') {
65+
66+ direction shift;
67+
68+ switch (string[2]) {
69+ case RIGHT_CODE:
70+ shift = RIGHT;
71+ break;
72+ case LEFT_CODE:
73+ shift = LEFT;
74+ break;
75+ case UP_CODE:
76+ shift = UP;
77+ break;
78+ case DOWN_CODE:
79+ shift = DOWN;
80+ break;
81+ }
82+
83+ switch (shift) {
84+ case UP:
85+ square_selected.y = ((square_selected.y + HEIGHT - 1) % HEIGHT);
86+ break;
87+ case DOWN:
88+ square_selected.y = ((square_selected.y + 1) % HEIGHT);
89+ break;
90+ case LEFT:
91+ square_selected.x = ((square_selected.x + WIDTH - 1) % WIDTH);
92+ break;
93+ case RIGHT:
94+ square_selected.x = ((square_selected.x + 1) % WIDTH);
95+ break;
96+ }
97+
98+ uint8_t i;
99+ for (i = 0; i < HEIGHT * 2; i++)
100+ printf("\033[A");
101+ printf("\r");
102+
103+ draw_board(square_selected);
104+
105+ }
106+ }
107+ }
108+ if (strstr(string, "q"))
109+ run = false;
110+ }
111+ }
112+
113+
114+ tcsetattr(STDIN_FILENO, TCSANOW, &old);
115+
116+ return 0;
117+}
118+
119+
120+void draw_board (selected square_selected) {
121+
122+ uint8_t i, j;
123+
124+ for ( i = 0; i < HEIGHT; i++) {
125+ for (j = 0; j < WIDTH; j++) {
126+ char character = 'X';
127+ uint8_t color = 31;
128+
129+ if (i == square_selected.y && j == square_selected.x) {
130+ character = 'O';
131+ color = 32;
132+ }
133+
134+ printf("\033[%um%5c\033[0m", color,color, character);
135+ }
136+ printf("\n\n");
137+ }
138+}