c - 结构函数返回不完整类型

Question

在 header.h 中我有:

typedef struct {
    int score;
    int dice[6];
    int scorecard[2][7];
} player;

然后在定义.c 中我有:

struct player do_turn(struct player user) {
    for (int i = 0; i < 6; i++) {
        int die = roll_die();
        user.dice[i] = die;
    }
    return (user);
}

在函数定义中，我收到错误“function do_turn returns incomplete type struct player”

我做错了什么？

Answer 1

该结构(只能)作为struct player访问:

struct player {
    int score;
    int dice[6];
    int scorecard[2][7];
};

struct player do_turn(struct player user) { ... }

这个结构(只能)作为玩家访问:

typedef struct {
    int score;
    int dice[6];
    int scorecard[2][7];
} player;

player do_turn(player user) { ... }

这个可以作为 player 或 struct player 访问:

typedef struct player {
    int score;
    int dice[6];
    int scorecard[2][7];
} player;

struct player do_turn(player user) { /* don't actually mix them like this :-P */ }

根据您希望的外观，更改您的结构定义、函数定义或两者，以使它们匹配。