initial commit
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cgol
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WARN = -Wall -Wextra -Wconversion -Wvla
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default:
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$(CC) $(WARN) main.c -o cgol
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debug:
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$(CC) $(WARN) -g3 main.c -o cgol
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run: default
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./cgol
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#include <stdio.h>
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#define WIDTH 213
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#define HEIGHT 56
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#define F_ARGS _Bool board[HEIGHT][WIDTH], int neighbours[HEIGHT][WIDTH], int y, int x
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int get_neighbours(_Bool board[HEIGHT][WIDTH], int y, int x)
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{
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int neighbours = 0;
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if(y > 0)
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{
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if(board[y - 1][x]) ++neighbours; // n
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if((x + 1) < WIDTH && board[y - 1][x + 1]) ++neighbours; // ne
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if( x > 0 && board[y - 1][x - 1]) ++neighbours; // nw
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}
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if((x + 1) < WIDTH && board[y][x + 1]) ++neighbours; // e
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if( x > 0 && board[y][x - 1]) ++neighbours; // w
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if((y + 1) < HEIGHT)
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{
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if(board[y + 1][x]) ++neighbours; // s
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if((x + 1) < WIDTH && board[y + 1][x + 1]) ++neighbours; // se
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if( x > 0 && board[y + 1][x - 1]) ++neighbours; // sw
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}
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return neighbours;
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}
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void iter(void (*f)(F_ARGS), _Bool board[HEIGHT][WIDTH], int neighbours[HEIGHT][WIDTH])
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{
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for(int y = 0; y < HEIGHT; ++y)
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{
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for(int x = 0; x < WIDTH; ++x)
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{
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(*f)(board, neighbours, y, x);
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}
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}
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}
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void print_board_pos(F_ARGS)
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{
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board[y][x] ? putc('*', stdout) : putc('.', stdout);
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if(x + 1 == WIDTH)
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putc('\n', stdout);
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}
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void calculate_neighbours(F_ARGS)
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{
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neighbours[y][x] = get_neighbours(board, y, x);
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}
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void apply_rules(F_ARGS)
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{
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if(neighbours[y][x] < 2 || neighbours[y][x] > 3)
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{
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board[y][x] = 0;
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}
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else if(neighbours[y][x] == 3)
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{
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board[y][x] = 1;
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}
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}
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int handle_input(int input)
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{
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switch(input)
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{
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case 'q':
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return 0;
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default:
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return 1;
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}
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}
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int main(void)
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{
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_Bool board[HEIGHT][WIDTH] = { 0 };
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int neighbours[HEIGHT][WIDTH] = { 0 };
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board[0][1] = 1;
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board[1][2] = 1;
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board[2][0] = 1;
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board[2][1] = 1;
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board[2][2] = 1;
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iter(&print_board_pos, board, neighbours);
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int input = getchar();
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_Bool run = handle_input(input);
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while(run)
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{
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iter(&calculate_neighbours, board, neighbours);
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iter(&apply_rules, board, neighbours);
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iter(&print_board_pos, board, neighbours);
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input = getchar();
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run = handle_input(input);
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}
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return 0;
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}
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