我可以在功能中创建动态数组并返回它吗？

Question

我试图获取某些元素（在这种情况下，它超出了某些价格） 添加到另一个数组，然后在函数（sortPrice）的末尾返回此新数组。

之后，我想将此新数组分配给 main（）：“ product *sortedprice”中的刚创建的数组，

但我得到了此错误：

“ primererenizpit1.c：in function'main'： PrimerEnizpit1.c：104：17：错误：分配给'产品 * {aka struct product *}'的类型不兼容的类型。 sortedprice = sortprice（products，50）;“

我理解它的函数类型和数组的类型，但我确实需要帮助。

只是要清楚。我对这个某些错误有一个疑问，所有其他代码都只是为了信息预先感谢您。

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

typedef struct Product
{
    char name[30];
    int code;
    char date[11];
    float price;
} product;

void addProduct(product *products, FILE *fp)
{
    products = (product *)realloc(products, (3 + 1) * sizeof(product));
    scanf("%s", products[3].name);
    scanf("%d", &products[3].code);
    scanf("%s", products[3].date);
    scanf("%f", &products[3].price);

    fp = fopen("in.bin", "wb");
    if (fp == NULL)
    {
        printf("Error.\n");
        exit(1);
    }
    if (fwrite(&products[3], sizeof(product), 1, fp) != 1)
    {
        printf("Error.\n");
        exit(1);
    }
    fclose(fp);
}

product sortPrice(product *products, float setPrice)
{
    product *newProducts;
    int newSize = 1;
    newProducts = (product *)calloc(newSize, sizeof(product));

    int pos = 0;

    for (int i = 0; i < 3; i++)
    {
        if (setPrice < products[i].price)
        {
            strcpy(newProducts[pos].name, products[i].name);
            newProducts[pos].code = products[i].code;
            strcpy(newProducts[pos].date, products[i].date);
            newProducts[pos].price = products[i].price;

            newSize++;
            newProducts = (product *)realloc(newProducts, newSize * sizeof(product));
        }
        pos++;
    }
    return newProducts;
}

void saveToTxt(FILE *fp)
{
    char savedName[30];
    int savedCode;
    char savedDate[11];
    float savedPrice;

    product savedProduct;
    fp = fopen("in.bin", "rb");
    fread(&savedProduct, sizeof(product), 1, fp);
    fclose(fp);

    printf("Binary Item:\n    Name: %s\n    ID: %d\n    Expire Date: %s\n    Price: %f\n", savedProduct.name, savedProduct.code, savedProduct.date, savedProduct.price);

    // TXT FILE
    fp = fopen("outTxt", "w");
    fprintf(fp, "%s %d %s %f", savedProduct.name, savedProduct.code, savedProduct.date, savedProduct.price);
    fclose(fp);

    fp = fopen("outTxt", "r");
    fscanf(fp, "%s %d %s %f", savedName, &savedCode, savedDate, &savedPrice);
    fclose(fp);

    printf("Text Item:\n    Name: %s\n    ID: %d\n    Expire Date: %s\n    Price: %f\n", savedName, savedCode, savedDate, savedPrice);
}

int main()
{
    // Dynamic Array
    product *products, *sortedPrice;
    products = (product *)calloc(3, sizeof(product));

    // File
    FILE *f;
    f = fopen("in.bin", "wb");
    fclose(f);

    // TXT FILE
    FILE *fp;
    fp = fopen("outTxt", "w");
    fclose(fp);

    addProduct(products, f);

    sortedPrice = sortPrice(products, 50);
    printf("%s - %d - %s - %f\n", sortedPrice->name, sortedPrice->code, sortedPrice->date, sortedPrice->price);

    saveToTxt(fp);

    return 0;
}