commit f319d000ebed86d363ad33592b3f7c684e54b0bd · technoduck.me/aoc_2025

day_4/4

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day_4/4.c

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       #include <stddef.h>

     

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       #include <stdio.h>

     

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       #include <stdlib.h>

     

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       int get_acces(int** matrix,int i,int j) {

     

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       int neighbors = 0;

     

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       }

     

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       int main(int argc, char* argv[]) {

     

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           FILE* f = NULL;

     

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           char* line = NULL;

     

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           size_t size = 0;

     

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           ssize_t nread = 0;

     

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           int len = 0;

     

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           int w = 0;

     

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           int** matrix_ptr = NULL;

     

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           f = fopen(argv[1], "r");

     

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           while ((nread = getline(&line, &size, f)) != -1) {

     

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               w = nread-2;

     

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               matrix_ptr = (int **)realloc(matrix_ptr, (len+1) * (nread-2)*sizeof(int));

     

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               matrix_ptr[len] = (int *)malloc((nread-2)*sizeof(int));

     

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               for (int i = 0; i< nread-1; i++) {

     

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               if (line[i] == '@') {

     

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                       matrix_ptr[len][i] = 1;

     

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               } else {

     

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                       matrix_ptr[len][i] = 0;

     

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               }

     

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        //               printf("%d",(&matrix_ptr)[j][i]);

     

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               }

     

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               len++;

     

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           }

     

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           // just a matrix out of input.

     

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       //

     

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           //  [(i-1,j-1)][(i-1,j)] [(i-1,j+1)]

     

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           //  [(i,j-1)]  [(i,j)]   [(i,j+1)]

     

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           //  [(i+1,j-1)][(i+1,j)] [(i+1,j+1)]

     

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           //  check all of those in clockwise order

     

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           // 

     

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           for (int i = 0; i<len; i++) {

     

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           for (int j = 0; j<w+1; j++) {

     

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                   printf("%d",matrix_ptr[i][j]);

     

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           }

     

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               printf("\n");

     

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           }

     

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           free(matrix_ptr);

     

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           free(f);

     

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           free(line);

     

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           return 0;

     

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       }

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day_4/mini.txt

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       ..@@.@@@@.

     

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       @@@.@.@.@@

     

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       @@@@@.@.@@

     

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       @.@@@@..@.

     

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       @@.@@@@.@@

     

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       .@@@@@@@.@

     

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       .@.@.@.@@@

     

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       @.@@@.@@@@

     

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       .@@@@@@@@.

     

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       @.@.@@@.@.