引言C语言作为一种历史悠久且应用广泛的编程语言,以其高效、灵活和可移植性著称。在饭店行业中,智能饭店系统的应用越来越普遍,它能够提高服务效率、优化顾客体验,并降低运营成本。本文将探讨如何利用C语言编程...
C语言作为一种历史悠久且应用广泛的编程语言,以其高效、灵活和可移植性著称。在饭店行业中,智能饭店系统的应用越来越普遍,它能够提高服务效率、优化顾客体验,并降低运营成本。本文将探讨如何利用C语言编程技术打造一个智能饭店系统。
在开始编程之前,我们需要对智能饭店系统的需求进行分析。以下是一些基本需求:
基于需求分析,我们可以设计以下模块:
以下是一些关键功能的C语言编程实现:
#include
#include
int main() { sqlite3 *db; char *err_msg = 0; int rc = sqlite3_open("restaurant.db", &db); if (rc) { fprintf(stderr, "无法打开数据库: %s\n", sqlite3_errmsg(db)); return 1; } rc = sqlite3_exec(db, "CREATE TABLE IF NOT EXISTS customers (id INTEGER PRIMARY KEY, name TEXT, phone TEXT)", 0, 0, &err_msg); if (rc != SQLITE_OK) { fprintf(stderr, "创建顾客表失败: %s\n", err_msg); sqlite3_free(err_msg); } sqlite3_close(db); return 0;
} #include
#include
void add_customer(sqlite3 *db, const char *name, const char *phone) { char sql[100]; sprintf(sql, "INSERT INTO customers (name, phone) VALUES ('%s', '%s')", name, phone); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); sqlite3_step(stmt); sqlite3_finalize(stmt);
}
void list_customers(sqlite3 *db) { char sql[100]; sprintf(sql, "SELECT id, name, phone FROM customers"); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); while (sqlite3_step(stmt) == SQLITE_ROW) { int id = sqlite3_column_int(stmt, 0); const char *name = (const char *)sqlite3_column_text(stmt, 1); const char *phone = (const char *)sqlite3_column_text(stmt, 2); printf("ID: %d, Name: %s, Phone: %s\n", id, name, phone); } sqlite3_finalize(stmt);
} #include
#include
void add_dish(sqlite3 *db, const char *name, float price) { char sql[100]; sprintf(sql, "INSERT INTO dishes (name, price) VALUES ('%s', %f)", name, price); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); sqlite3_step(stmt); sqlite3_finalize(stmt);
}
void list_dishes(sqlite3 *db) { char sql[100]; sprintf(sql, "SELECT id, name, price FROM dishes"); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); while (sqlite3_step(stmt) == SQLITE_ROW) { int id = sqlite3_column_int(stmt, 0); const char *name = (const char *)sqlite3_column_text(stmt, 1); float price = sqlite3_column_double(stmt, 2); printf("ID: %d, Name: %s, Price: %.2f\n", id, name, price); } sqlite3_finalize(stmt);
} #include
#include
void create_order(sqlite3 *db, int customer_id, int dish_id, int quantity) { char sql[100]; sprintf(sql, "INSERT INTO orders (customer_id, dish_id, quantity) VALUES (%d, %d, %d)", customer_id, dish_id, quantity); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); sqlite3_step(stmt); sqlite3_finalize(stmt);
}
void list_orders(sqlite3 *db) { char sql[100]; sprintf(sql, "SELECT o.id, c.name, d.name, o.quantity, o.quantity * d.price FROM orders o JOIN customers c ON o.customer_id = c.id JOIN dishes d ON o.dish_id = d.id"); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); while (sqlite3_step(stmt) == SQLITE_ROW) { int id = sqlite3_column_int(stmt, 0); const char *customer_name = (const char *)sqlite3_column_text(stmt, 1); const char *dish_name = (const char *)sqlite3_column_text(stmt, 2); int quantity = sqlite3_column_int(stmt, 3); float price = sqlite3_column_double(stmt, 4); printf("ID: %d, Customer: %s, Dish: %s, Quantity: %d, Total: %.2f\n", id, customer_name, dish_name, quantity, price); } sqlite3_finalize(stmt);
} #include
#include
void add_inventory(sqlite3 *db, const char *item, int quantity) { char sql[100]; sprintf(sql, "INSERT INTO inventory (item, quantity) VALUES ('%s', %d)", item, quantity); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); sqlite3_step(stmt); sqlite3_finalize(stmt);
}
void list_inventory(sqlite3 *db) { char sql[100]; sprintf(sql, "SELECT item, quantity FROM inventory"); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); while (sqlite3_step(stmt) == SQLITE_ROW) { const char *item = (const char *)sqlite3_column_text(stmt, 0); int quantity = sqlite3_column_int(stmt, 1); printf("Item: %s, Quantity: %d\n", item, quantity); } sqlite3_finalize(stmt);
} #include
#include
void sales_report(sqlite3 *db) { char sql[100]; sprintf(sql, "SELECT d.name, SUM(o.quantity * d.price) AS total_sales FROM orders o JOIN dishes d ON o.dish_id = d.id GROUP BY d.name"); sqlite3_stmt *stmt; sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); while (sqlite3_step(stmt) == SQLITE_ROW) { const char *dish_name = (const char *)sqlite3_column_text(stmt, 0); float total_sales = sqlite3_column_double(stmt, 1); printf("Dish: %s, Total Sales: %.2f\n", dish_name, total_sales); } sqlite3_finalize(stmt);
} 完成编程后,我们需要对系统进行测试,确保其稳定性和可靠性。测试内容包括:
利用C语言编程技术打造智能饭店系统是一个复杂但富有挑战性的任务。通过合理的设计和编程,我们可以开发出一个高效、稳定且易于维护的系统。随着技术的不断进步,智能饭店系统将会在饭店行业中发挥越来越重要的作用。