使用 fopen 时的段错误

Question

I am getting segmentation fault when I use fopen function. if i use file not in struct then no error occurs. i guess the segfault comes from using a file from a struct

int     main(int argc, char **argv)
{
    t_paint     *paint;

    if (argc != 2)
    {
        write (1, "Error: argument\n", 16);
        return (1);
    }
    paint->file = fopen(argv[1], "r");
    if (paint->file == NULL || parsing(paint))
    {
        write(1, "Error: Operation file corrupted\n", 32);
        free(paint->map);
        fclose(paint->file);
        return (1);
    }
    output(paint);
    fclose(paint->file);
    free(paint->map);
    return (0);
}

t_paint

typedef struct      s_paint
{
    char            *map;
    int             widthMap;
    int             heightMap;
    float           firstX;
    float           firstY;
    float           w;
    float           h;
    char            typeFile;
    char            background;
    char            filler;
    FILE            *file;
}                   t_paint

Answer 1

t_paint     *paint;

if (argc != 2)
{
    write (1, "Error: argument\n", 16);
    return (1);
}
paint->file = fopen(argv[1], "r");

You modify the file member of the object paint points to. But paint doesn't point to anything -- you never assigned it a value or created an instance of t_paint .