如何利用MySQL和C++开发一个简单的考试系统

#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;
}