初始化大量结构

Question

I need to store a lot of information about certain resolutions at some way, I would like to make a struct for this.

struct resolution{
    const char* name;
    const int width;
    const int height;
};

The problem is I need to store a lot of resolutions in some array of structs, but can't get this work properly (need to store 126 things to it 'manual', so no loops or that kind of stuff.

Thanks!

Answer 1

Have you tried an initializer?

struct resolution {
  const char * name ;
  const int width ;
  const int height ;
}
  mylist[] = 
  {
    { "cga", 320, 240 },
    { "vga", 640, 480 },
    { "xga", 1024, 768 },
  } ;

As a bonus, you can store a sentinel at the end so any loop that reads these can stop on the value instead of keeping track of how long the list is: Using something like:

{ NULL, 0, 0 }

So you can check if the name is NULL or the size, like this:

const struct resolution *  find_bysize( int w, int h )
{
  struct resolution * searchptr ;

  for (searchptr= mylist ; ( searchptr-> name ) ; searchptr ++ )
    { if (( searchptr-> width == w ) && (searchptr-> height == h )) { return searchptr ; } }
  return NULL ;  // not found
}