用C语言超市信息管理系统 功能要求: 1.每一条记录包括一个商品的编号，名称，价格，条形码，进货日期。库存，销售数量。 2.输入功能:可以一次完成若干条记录的输入。 3.显示功能:完成全部记录的显示。 4.查找功能:用折半查找完成按商品编号查找记录并显示。 5.排序功能:用希尔排序按销售数量从高到低或者按照商品编号进行排序。 6. 插入功能:按编号插入一条记录。 7.将记录保存在文件中。 8. 应提供一个菜单来调用各个功能，调用菜单的界面应尽可能清晰美观。 9.删除功能 10.修改功能 11.代码要有亮点，并且将代码展示出来

以下是一个基于C语言的超市信息管理系统的实现，具有上述功能要求：

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

struct product {
    int id;
    char name[50];
    float price;
    char barcode[20];
    char purchase_date[20];
    int stock;
    int sold_count;
};

// Function prototypes
void display_menu();
void add_product(struct product *products, int *count);
void display_products(struct product *products, int count);
void search_product(struct product *products, int count);
void sort_products_by_sold_count(struct product *products, int count);
void sort_products_by_id(struct product *products, int count);
void insert_product(struct product *products, int *count);
void delete_product(struct product *products, int *count);
void modify_product(struct product *products, int count);
void save_to_file(struct product *products, int count);
void load_from_file(struct product *products, int *count);

int main() {
    struct product products[100];
    int count = 0;
    int choice;

    load_from_file(products, &count);

    do {
        display_menu();
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_product(products, &count);
                break;
            case 2:
                display_products(products, count);
                break;
            case 3:
                search_product(products, count);
                break;
            case 4:
                sort_products_by_sold_count(products, count);
                break;
            case 5:
                sort_products_by_id(products, count);
                break;
            case 6:
                insert_product(products, &count);
                break;
            case 7:
                delete_product(products, &count);
                break;
            case 8:
                modify_product(products, count);
                break;
            case 9:
                save_to_file(products, count);
                printf("Products saved to file!\n");
                break;
            case 10:
                load_from_file(products, &count);
                printf("Products loaded from file!\n");
                break;
            case 11:
                printf("Exiting program...\n");
                break;
            default:
                printf("Invalid choice. Please try again.\n");
        }
    } while (choice != 11);

    return 0;
}

void display_menu() {
    printf("\n-- Supermarket Information Management System --\n");
    printf("1. Add product\n");
    printf("2. Display all products\n");
    printf("3. Search product by ID\n");
    printf("4. Sort products by sold count\n");
    printf("5. Sort products by ID\n");
    printf("6. Insert product\n");
    printf("7. Delete product\n");
    printf("8. Modify product\n");
    printf("9. Save products to file\n");
    printf("10. Load products from file\n");
    printf("11. Exit\n");
}

void add_product(struct product *products, int *count) {
    printf("\nEnter product details:\n");
    printf("ID: ");
    scanf("%d", &products[*count].id);
    printf("Name: ");
    scanf("%s", products[*count].name);
    printf("Price: ");
    scanf("%f", &products[*count].price);
    printf("Barcode: ");
    scanf("%s", products[*count].barcode);
    printf("Purchase date: ");
    scanf("%s", products[*count].purchase_date);
    printf("Stock: ");
    scanf("%d", &products[*count].stock);
    printf("Sold count: ");
    scanf("%d", &products[*count].sold_count);

    (*count)++;
}

void display_products(struct product *products, int count) {
    if (count == 0) {
        printf("\nNo products found.\n");
        return;
    }

    printf("\n%-5s %-20s %-10s %-20s %-20s %-8s %-10s\n", "ID", "Name", "Price", "Barcode", "Purchase date", "Stock", "Sold");
    for (int i = 0; i < count; i++) {
        printf("%-5d %-20s %-10.2f %-20s %-20s %-8d %-10d\n", products[i].id, products[i].name, products[i].price, products[i].barcode, products[i].purchase_date, products[i].stock, products[i].sold_count);
    }
}

void search_product(struct product *products, int count) {
    if (count == 0) {
        printf("\nNo products found.\n");
        return;
    }

    int id;
    printf("\nEnter product ID to search for: ");
    scanf("%d", &id);

    int left = 0;
    int right = count - 1;
    int found = 0;
    while (left <= right) {
        int mid = (left + right) / 2;
        if (products[mid].id == id) {
            printf("\n%-5s %-20s %-10s %-20s %-20s %-8s %-10s\n", "ID", "Name", "Price", "Barcode", "Purchase date", "Stock", "Sold");
            printf("%-5d %-20s %-10.2f %-20s %-20s %-8d %-10d\n", products[mid].id, products[mid].name, products[mid].price, products[mid].barcode, products[mid].purchase_date, products[mid].stock, products[mid].sold_count);
            found = 1;
            break;
        } else if (products[mid].id < id) {
            left = mid + 1;
        } else {
            right = mid - 1;
        }
    }

    if (!found) {
        printf("\nProduct not found.\n");
    }
}

void sort_products_by_sold_count(struct product *products, int count) {
    for (int gap = count / 2; gap > 0; gap /= 2) {
        for (int i = gap; i < count; i++) {
            struct product temp = products[i];
            int j;
            for (j = i; j >= gap && products[j - gap].sold_count < temp.sold_count; j -= gap) {
                products[j] = products[j - gap];
            }
            products[j] = temp;
        }
    }

    printf("\nProducts sorted by sold count (descending order):\n");
    display_products(products, count);
}

void sort_products_by_id(struct product *products, int count) {
    for (int gap = count / 2; gap > 0; gap /= 2) {
        for (int i = gap; i < count; i++) {
            struct product temp = products[i];
            int j;
            for (j = i; j >= gap && products[j - gap].id > temp.id; j -= gap) {
                products[j] = products[j - gap];
            }
            products[j] = temp;
        }
    }

    printf("\nProducts sorted by ID:\n");
    display_products(products, count);
}

void insert_product(struct product *products, int *count) {
    int id;
    printf("\nEnter product ID to insert: ");
    scanf("%d", &id);

    // Shift elements to make room for insertion
    int i;
    for (i = *count - 1; i >= 0 && products[i].id > id; i--) {
        products[i + 1] = products[i];
    }

    // Insert new element
    printf("Enter product details:\n");
    printf("Name: ");
    scanf("%s", products[i + 1].name);
    printf("Price: ");
    scanf("%f", &products[i + 1].price);
    printf("Barcode: ");
    scanf("%s", products[i + 1].barcode);
    printf("Purchase date: ");
    scanf("%s", products[i + 1].purchase_date);
    printf("Stock: ");
    scanf("%d", &products[i + 1].stock);
    printf("Sold count: ");
    scanf("%d", &products[i + 1].sold_count);
    products[i + 1].id = id;

    (*count)++;
}

void delete_product(struct product *products, int *count) {
    if (*count == 0) {
        printf("\nNo products found.\n");
        return;
    }

    int id;
    printf("\nEnter product ID to delete: ");
    scanf("%d", &id);

    int i;
    for (i = 0; i < *count; i++) {
        if (products[i].id == id) {
            // Shift elements after deletion point
            for (int j = i; j < *count - 1; j++) {
                products[j] = products[j + 1];
            }

            (*count)--;
            printf("\nProduct with ID %d deleted.\n", id);
            return;
        }
    }

    printf("\nProduct not found.\n");
}

void modify_product(struct product *products, int count) {
    if (count == 0) {
        printf("\nNo products found.\n");
        return;
    }

    int id;
    printf("\nEnter product ID to modify: ");
    scanf("%d", &id);

    for (int i = 0; i < count; i++) {
        if (products[i].id == id) {
            printf("\nEnter new product details:\n");
            printf("Name: ");
            scanf("%s", products[i].name);
            printf("Price: ");
            scanf("%f", &products[i].price);
            printf("Barcode: ");
            scanf("%s", products[i].barcode);
            printf("Purchase date: ");
            scanf("%s", products[i].purchase_date);
            printf("Stock: ");
            scanf("%d", &products[i].stock);
            printf("Sold count: ");
            scanf("%d", &products[i].sold_count);

            printf("\nProduct with ID %d modified.\n", id);
            return;
        }
    }

    printf("\nProduct not found.\n");
}

void save_to_file(struct product *products, int count) {
    FILE *fp = fopen("products.dat", "wb");
    fwrite(&count, sizeof(int), 1, fp);
    fwrite(products, sizeof(struct product), count, fp);
    fclose(fp);
}

void load_from_file(struct product *products, int *count) {
    FILE *fp = fopen("products.dat", "rb");
    if (fp == NULL) {
        printf("\nNo file found.\n");
        return;
    }

    fread(count, sizeof(int), 1, fp);
    fread(products, sizeof(struct product), *count, fp);
    fclose(fp);
}

该程序使用了结构体来存储商品信息，并提供了各种功能来添加、显示、查找、排序、插入、删除和修改商品信息，以及将商品信息保存到文件中或从文件中加载商品信息。该程序还提供了一个清晰美观的菜单界面，让用户可以方便地使用各种功能。