Question

“init_deck”方法返回错误：从类型struct * Card分配类型struct Card时出现不兼容的类型（* p ++ = card_create（rank [k]，suit [j]））

我不确定这意味着什么，或者如何解决这个问题。如果有人能够解释这在装配级实际上做了什么以及它如何与C相对应，那将非常感激。

#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

int main(int argc, char *argv[]){

struct Card{
 int value;
 char* suit;
};

struct Card *card_create(int value, char* suit){
 struct Card *theCard = malloc(sizeof(struct Card));
 assert(theCard != NULL);

 theCard->value = value;
 theCard->suit = strdup(suit);

return theCard;
}

void card_destroy(struct Card *theCard){
 assert(theCard != NULL);

 free(theCard->suit);
 free(theCard);
}

void setValue(struct Card *theCard, int value){
 theCard->value = value;
}

int getValue(struct Card *theCard){
 return theCard->value;
}

char* getSuit(struct Card *theCard){
 return theCard->suit;
}

void card_print(struct Card *theCard){
 printf("%i of %s\n", getValue(theCard), getSuit(theCard));
}

void init_deck(struct Card deck[52]){

struct Card *p = deck;
char *suits[] = {"Hearts", "Diamonds", "Clubs", "Spades"};
int rank[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 74, 81, 75, 65}  //Last 4 numbers are int rep of char: J, Q, K, A
int j = 0, k = 0;
for(; j < 4; j++)
  for(; k < 13; k++)
    (*p++ = card_create(rank[k], suits[j]));
}
}

Answer 1

card_create返回指针，但*p不是指针。（不同类型）

（1）

替换

*p++ = card_create(rank[k], suits[j])

与

struct Card *aCard = card_create(rank[k], suits[j]);    
*p++ = *aCard;
card_destroy(aCard);

（2）card_create non use malloc version

struct Card card_create(int value, char* suit){
    struct Card theCard;
    theCard.value = value;
    theCard.suit = strdup(suit);//Since you are using a string literal Strdup it is not required. just theCard.suit = suit;

    return theCard;
}

...

*p++ = card_create(rank[k], suits[j])

Answer 2

您的deck应该是卡**而不是卡*。

card_create的结果是Card*，您尝试使用指针Card放入*p stuct。

不兼容的类型分配

2 个答案: