问读取文本文件以提取c中的坐标

EN

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

struct point {
    int x;
    int y;
    char name[8];
};

struct point *points;
int count;
int map_row;
int map_col;

void
read_data(const char *file_name)
{
    FILE *fp = fopen(file_name, "r");
    if (fp == NULL) {
        /* if the file opened is empty or has any issues, then show the error */
        perror("File Error");
        return;
    }

    /* get the dimensions from the file */
    fscanf(fp, "%d %d", &map_row, &map_col);
    map_row = map_row + 2;
    map_col = map_col + 2;

    while (1) {
        // enlarge dynamic array
        ++count;
        points = realloc(points,sizeof(*points) * count);

        // point to place to store data
        struct point *cur = &points[count - 1];

        if (fscanf(fp, "%d %d %s", &cur->x, &cur->y, cur->name) != 3)
            break;
    }

    // trim to amount used
    --count;
    points = realloc(points,sizeof(*points) * count);

    fclose(fp);
}

#include <stdio.h>

#define MAXC 1024   /* if you need a constand, #define one (or more) */

int main (int argc, char **argv) {
  
  char buf[MAXC];           /* buffer to hold each line */
  int map_row, map_col;     /* map row/col variables */
  /* use filename provided as 1st argument (stdin if none provided) */
  FILE *fp = argc > 1 ? fopen (argv[1], "r") : stdin;
  
  if (!fp) {  /* validate file open for reading */
    perror ("file open");
    return 1;
  }
  
  /* read/validate first line saving into map_row, map_col */
  if (!fgets (buf, MAXC, fp) || 
      sscanf (buf, "%d %d", &map_row, &map_col) != 2) {
    fputs ("error: EOF or invalid map row/col data.\n", stderr);
    return 1;
  }
  
  /* loop reading remaining lines, for used as line counter */
  for (size_t i = 2; fgets (buf, MAXC, fp); i++) {
    char suffix;
    int x, y;
    
    /* validate parsing x, y, suffix from buf */
    if (sscanf (buf, "%d %d %c", &x, &y, &suffix) != 3) {
      fprintf (stderr, "error: invalid format line %zu.\n", i);
      continue;
    }
    
    if (suffix == 'X') {  /* check if line suffix is 'X' */
      printf ("%2d    %2d    %c\n", x, y, suffix);
    }
  }
  
  if (fp != stdin) {      /* close file if not stdin */
    fclose (fp);
  }
}

$ ./bin/readcoordinates dat/coordinates.txt
 9     8    X
 5     6    X
 7     8    X
12    13    X
14    15    X