c - 我怎样才能使这个结构在 C 中工作？

Question

我一直在尝试学习 C 中的结构，但不知道如何使这段代码工作。我不断收到此错误:

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

^
test.c:2:8: 

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

代码:

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

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

}

Answer 1

首先你需要定义结构:

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

然后你可以声明它:

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