Я не могу получить данные из txt-файла

Вот небольшая поправка и предложение

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#define PI 3.14159265359

// Definition of the struct exp_point
struct exp_point {
    double x, y;
    double x1, y1;
    int line;
};

int main() {
    double X0 = 5, Y0 = 5, FI = 0.7854; // FI in radians
    double fi = FI; // Using FI directly since it is already in radians
    int i = 0, j = 0;
    double d, x, y, x1, y1;
    FILE *fp;

    // Provide the absolute path to the file
    const char *file_path = "/ABSOLUTE/PATH/file.txt"; // Replace with your actual file path

    // Attempt to open the file
    if ((fp = fopen(file_path, "r")) == NULL) {
        perror("Error opening file");
        exit(EXIT_FAILURE);
    }

    // Reading the file until the end
    while (fscanf(fp, "%lf %lf", &x, &y) == 2) {
        printf("Read values: x = %lf, y = %lf\n", x, y);
        
        // Applying transformation
        x1 = (x - X0) * cos(fi) + (y - Y0) * sin(fi);
        y1 = (y - Y0) * cos(fi) - (x - X0) * sin(fi);
        
        // Calculating distance using hypot
        d = hypot(x1 - X0, y1 - Y0);
        
        if (d > 10.0)
            i++;
        else
            j++;
    }

    // Close the file
    fclose(fp);

    printf("i = %d, j = %d\n", i, j);

    // Allocate memory for exp_point structures
    struct exp_point *lim = (struct exp_point *)calloc(i, sizeof(struct exp_point));
    struct exp_point *arr = (struct exp_point *)calloc(j, sizeof(struct exp_point));
    
    if (lim == NULL || arr == NULL) {
        perror("Error allocating memory");
        exit(EXIT_FAILURE);
    }

    printf("Total points processed: %d\n", i + j);

    // Free allocated memory
    free(lim);
    free(arr);

    return 0;
}

Получить абсолютный путь

#include <unistd.h>
#include <limits.h>
#include <stdio.h>

int main() {
    char cwd[PATH_MAX];
    if (getcwd(cwd, sizeof(cwd)) != NULL) {
        printf("Current working directory: %s\n", cwd);
    } else {
        perror("getcwd() error");
        return 1;
    }

    // The rest of your code...
}