struct parametr in function gcc

Question

I wrote some code and works perfectly using g++ compiler, but when I use gcc, it throws an error Unknow type name 'Image' in void load_image(FILE*, Image*);

Here's a part of my header file:

struct Image {
    struct FileHeader file_header;
    struct InfoHeader info_header;
    struct RGBQuads rgbquads;
    struct Pixel** pixel;
    struct Pixel* pixels_array;
};

void load_image(FILE*, Image*);

So I cant understand whats the problem. I was trying to write using C rules.

Answer 1

It seems that you are compiling the program as a C program. If so then you have to write

void load_image(FILE*, struct Image*);

Another approach is to use typedef for the structure. For example

typedef struct Image {
    struct FileHeader file_header;
    struct InfoHeader info_header;
    struct RGBQuads rgbquads;
    struct Pixel** pixel;
    struct Pixel* pixels_array;
} Image;

void load_image(FILE*, Image*);