C Programming - Non static initialization of a flexible array member

I think my english is just to bad to understand the other articles about this. But anyway:

I just thought i could write a program (in C), that can store a set of cards. Not complicated, just store values and names of cards and print them out. I'm a beginner in C, and because i'm in the section "Strings in Structures" in my Book, i wanted to try out structures on my own. This is my Code so far:

#include <stdio.h>

struct card
{
    int value;
    char name[];
};

int main(void)
{
    const struct card heart[13] = { {2,"two"}, {3,"three"}, {4,"four"}, {5,"five"}, {6,"six"}, {7,"seven"}, {8,"eight"}, {9,"nine"}, {10,"ten"}, {11,"jack"}, {12,"queen"}, {13,"king"}, {14,"ace"} };
    int i;

    for (i = 0; i < 13; ++i)
    {
        printf("The card heart-%s has the value of %i", heart[i].name, heart[i].value);
    }

return 0;

}

I just wanted to test if it works, so i just wrote the heart-cards in the code. If i want to compile this file, my compiler (gcc/mingw) hits me with 26 errors. It says: "(near initialization of heart[0])" "non static initialization of a flexible array member" I don't really understand this. In the book, everything works as expected. I tried to rebuild the code in the book and changing the names, but it doesn't work. I think it's a problem with the strings, because if i use integers only, everything works. In already read in another post, that every string should be allocated manually, and there was a code example, but i don't know what all the lines should mean, and i want understand what my code does, so i don't copy + paste.

Could you explain me why this doesn't work? PS: I am writing currently in windows, so please don't use bash commands to explain or something like that. I am also german and my english is not the "yellow of the egg", try to explain without using complex 'sentence builds' (i hope you know what i mean :D) and unusual words.

Thanks for all help!

You need to create some space for the name of each card. Easiest way to do this would be to change your struct card definition to something like:

struct card
{
  int value;
  char name[16];  // doesn't have to be 16, but make sure it's large enough to hold each card name plus a '\0' terminator
};