如何打印结构体的成员，奇怪的错误

Question

我一直在尝试打印我创建的结构体的成员，但是有一些声明错误显示我的结构体未声明。我有一个单独的函数来打印结构体的成员。我不知道如何调试它…请帮助我有错误，如game1-未声明(第一次使用在这个函数)和预期=，;{token

之前的Asm或属性

#include <stdio.h>
#include <stdlib.h>
struct video_game
{
  char *name, *genre, *developer, *platformer, *app_purchase;
  int release_year, age_limit;
  float price;
};
void print_video_game_details(struct video_game* s)
{
  printf("nTitle: %sn", s->name);
  printf("Genre: %sn", s->genre);
  printf("Developer: %sn", s->developer);
  printf("Year of Release: %dn", s->release_year);
  printf("Lower Age Limit: %dn", s->age_limit);
  printf("Price: $%fn", s->price);
  printf("In-app Purchase: %sn", s->app_purchase);
}
int main(int agrc, char* agrv[])
{
  struct video_game game1
  {
    game1.name = "Candy Crush Saga";
    game1.genre = "Match-Three Puzzle";
    game1.developer = "King";
    game1.release_year = 2012;
    game1.platform = "Android, iOS, Windows Phone";
    game1.age_limit = 7;
    game1.price = 0.00;
    game1.app_purchase = "Yes";
  };
  
  struct video_game game2
  {
    game2.name = "Halo 4";
    game2.genre = "First Person Shooter";
    game2.developer = "343 Industries";
    game2.release_year = 2014;
    game2.platform = "Xbox 360, Xbox One";
    game2.age_limit = 16;
    game2.price = 69.95;
    game2.app_purchase = "No";
  };
  
  struct video_game game1
  {
    game3.name = "Uncharted 2: Among Thieves";
    game3.genre = "Action adventure RPG";
    game3.developer = "Naughty Dog";
    game3.release_year = 2012;
    game3.platform = "PS3";
    game3.age_limit = 16;
    game3.price = 30.00;
    game3.app_purchase = "No";
  };
  
  print_video_game_details(&game1);
  print_video_game_details(&game2);
  print_video_game_details(&game3);
  return 0;
}  
  

Answer 1

您的实例创建(game1, game2和game3)不是C语言，它们使用一些虚构的语法。

应该像

struct video_game game1 = {
  .name = "Candy Crush Saga",
  /* ... */
};

您需要定义三个类型为struct video_game的变量，而<type> <name> [= <initializer>](大致)是c中变量的定义方式。

如果你没有C99，它必须是:

struct video_game game1 = {
  "Candy Crush Saga",
  "Match-Three Puzzle",
  "King",
  "Android, iOS, Windows Phone",
  "Yes",
  2012,
  7,
  0.00
};

注意事项，你似乎忽略了:

• 初始化器中没有字段名，只有值。
• 顺序必须与struct声明时完全一致;首先是五个字符串，然后是两个整数，然后是一个浮点数。
• 值之间用逗号分隔，而不是分号。