如何利用MySQL和C 開發一個簡單的考試系統
目前,在教育領域中,對電子化考試系統的需求越來越大。本文將介紹如何使用MySQL和C 開發一個簡單的考試系統。透過該系統,教師可以建立題庫,並產生試卷,學生可以登入系統進行考試,並自動評分。
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C 開發
#include <mysql_driver.h> #include <mysql_connection.h> using namespace std; using namespace sql; int main() { sql::mysql::MySQL_Driver *driver; sql::Connection *con; driver = sql::mysql::get_mysql_driver_instance(); con = driver->connect("tcp://127.0.0.1:3306", "root", "password"); con->setSchema("exam_system"); // 进行数据库操作 delete con; return 0; }
#include <iostream> #include <string> #include <vector> #include <mysql_driver.h> #include <mysql_connection.h> using namespace std; using namespace sql; class ExamSystem { private: sql::mysql::MySQL_Driver *driver; sql::Connection *con; public: ExamSystem() { driver = sql::mysql::get_mysql_driver_instance(); con = driver->connect("tcp://127.0.0.1:3306", "root", "password"); con->setSchema("exam_system"); } ~ExamSystem() { delete con; } vector<string> getQuestions() { vector<string> questions; // 查询题库表,获取题目和选项 sql::Statement *stmt; sql::ResultSet *res; stmt = con->createStatement(); res = stmt->executeQuery("SELECT question, options FROM questions"); while (res->next()) { string question = res->getString("question"); string options = res->getString("options"); // 将题目和选项拼接成一个字符串并添加到vector中 questions.push_back(question + " " + options); } delete res; delete stmt; return questions; } void generateExam(string name) { // 生成试卷并插入考试表 sql::Statement *stmt; stmt = con->createStatement(); stmt->execute("INSERT INTO exams (name, teacher_id) VALUES ('" + name + "', 1)"); delete stmt; } void submitResponse(int student_id, int exam_id, vector<string> choices) { // 将考试答卷插入答卷表 sql::Statement *stmt; stmt = con->createStatement(); stmt->execute("INSERT INTO responses (student_id, exam_id, choices) VALUES (" + to_string(student_id) + ", " + to_string(exam_id) + ", '" + choices + "')"); delete stmt; } float calculateScore(int student_id, int exam_id) { float score = 0; // 查询答卷表,计算得分 sql::Statement *stmt; sql::ResultSet *res; stmt = con->createStatement(); res = stmt->executeQuery("SELECT choices FROM responses WHERE student_id = " + to_string(student_id) + " AND exam_id = " + to_string(exam_id)); string choices; if (res->next()) { choices = res->getString("choices"); } // 根据题目和答案的对应关系计算得分 delete res; delete stmt; return score; } }; int main() { ExamSystem examSystem; vector<string> questions = examSystem.getQuestions(); // 输出题目和选项 return 0; }
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