c-使用fopen时出现Segfault

Question

使用fopen函数时出现分段错误。如果我使用不在结构中的file，则不会发生错误。我猜segfault来自于使用来自结构的file

int     main(int argc, char **argv)
{
t_paint     *paint;
if (argc != 2)
{
write (1, "Error: argumentn", 16);
return (1);
}
paint->file = fopen(argv[1], "r");
if (paint->file == NULL || parsing(paint))
{
write(1, "Error: Operation file corruptedn", 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: argumentn", 16);
return (1);
}
paint->file = fopen(argv[1], "r");

您修改了paint指向的对象的file成员。但paint不指向任何东西——您从未为其分配值或创建t_paint的实例。