Golf Snake

A minimalist implementation of the classic game Snake using minimal code.

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Rules

Objective

To create a Snake program with as few lines of code as possible, adhering to the program constraints and line-breaking rules. In case of equal line counts, prioritize minimizing the number of characters (excluding whitespace).

Program Constraints

• Input Handling: Ability to read W, A, S, D keys for controlling the snake's movement without blocking; case insensitivity; processing of all inputs in the buffer per frame; discarding of invalid inputs (impossible direction changes, characters other than W, A, S, D).

• Movement Handling: Recording of the snake's body position; updating of the snake's body position after movement.

• Food Handling: Properly increasing the snake's length upon eating food; generating new food randomly; ensuring new food does not appear on the snake's body.

• Failure Handling: Detection of failure upon snake collision with walls or itself, leading to program termination.

• Output Handling: Generation of a visual interface on the console; see Sample for the interface layout.

• Frame Length: Each frame should not be shorter than 100ms.

• Library Usage: Allowed to use the standard library and platform-specific libraries (e.g., windows.h for Windows and unistd.h for Linux). Allowed to include -include in compile options instead of preprocessing commands. Not allowed to include your own libraries.

• Stability: Prevention of program crashes under any circumstance.

• Syntax Requirement: Utilization of ISO C99 standard syntax.

• No Undefined Behavior: Ensuring the program exhibits no undefined behavior.

Line-breaking Rules

• Not Allowed: Chaining of independent statements separated by semicolons.

  Example:

  int a = 0; b = 1;

  Correct Approach:

  int a = 0;
  b = 1;

• Not Allowed: Lack of line breaks within the braces following if, while, for statements.

  Example:

  if (a == 0) { b = 1; }
  
  if (a == 0) {
      b = 1; }
  
  if (a == 0) { b = 1;
  }

  Correct Approach:

  if (a == 0) {
      b = 1;
  }

  Subject to the above rules,

• Allowed: Chaining of a single expression after if, while, for statements.

  Example:

  if (a == 0) b = 1;

• Allowed: Chaining within the parentheses of if, while, for expressions.

• Allowed: Chaining using comma expressions. Example:

  while (c = getchar(), c != EOF);

Environment

• Windows 22H2

• clang 17.0.1

Compile

make

Usage

make run

Sample

| ` ` ` ` ` ` ` `|
| `*` ` ` ` ` ` `|
| ` ` `@`@` ` ` `|
| ` ` ` `@` `@` `|
| ` ` ` `@` `@` `|
| ` ` ` `@`@`@` `|
| ` ` ` ` ` ` ` `|
| ` ` ` ` ` ` ` `|