我该如何在C中使用此结构？

Question

I've been trying to learn structs in C and can't figure out how to make this code to work. I keep getting this error:

incomplete type 'struct card' struct card aCard = {"Three", "Hearts"};

^
test.c:2:8: 

note: forward declaration of
      'struct card'
struct card aCard = {"Three", "Hearts"}; 

The code:

#include<stdio.h>
struct card aCard = {"Three", "Hearts"};

int main(void){
printf("%s", aCard.suit);

}

Answer 1

First you need to define the structure:

struct card {
   char  type[4];
   int  value;
};

And then you can declare it :

struct card card1; /*Declaration card1 of type card*/