How to use C++ to write a simple student performance management program?

How to use C to write a simple student performance management program?

Introduction:
In schools or educational institutions, the management of student performance is a very important task. In order to manage student performance more efficiently, we can use C language to write a simple student performance management program. This article will introduce how to use C language to implement a simple student performance management program.

1. Needs Analysis
Before writing a student performance management program, we need to conduct a needs analysis first. Based on the actual situation, we can determine the following functional requirements:

1. Add student information and grades;
2. Modify student information and grades;
3. Delete student information and grades;
4. Query student information and scores;
5. Statistics on student total scores and average scores;
6. Display all student information and scores.

2. Program Design
Based on the demand analysis, we can start to design the structure and modules of the student performance management program.

1. Student class design:
   First you need to design a student class, which can contain the student’s basic information and performance information:

   class Student {
   private:
    string name;  // 学生姓名
    int id;       // 学生学号
    float score;  // 学生成绩
   public:
    // 构造函数
    Student(string name, int id, float score) {
        this->name = name;
        this->id = id;
        this->score = score;
    }
    
    // getter和setter方法
    string getName() {
        return name;
    }
    
    int getId() {
        return id;
    }
    
    float getScore() {
        return score;
    }
    
    void setName(string name) {
        this->name = name;
    }
    
    void setId(int id) {
        this->id = id;
    }
    
    void setScore(float score) {
        this->score = score;
    }
   };

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2. Main menu design:
   Design a main menu, including various functional options of the management program:

   void showMainMenu() {
    cout << "1. 添加学生信息和成绩" << endl;
    cout << "2. 修改学生信息和成绩" << endl;
    cout << "3. 删除学生信息和成绩" << endl;
    cout << "4. 查询学生信息和成绩" << endl;
    cout << "5. 统计学生总成绩和平均成绩" << endl;
    cout << "6. 显示所有学生信息和成绩" << endl;
    cout << "0. 退出程序" << endl;
   }

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3. Implement each functional module:
   According to needs, we can add, modify, Specific operations of deletion, query, statistics and display functions.

4. Main program:
   Design a main program to read the options entered by the user in a loop and call the corresponding function module function according to the options.

   int main() {
    vector<Student> students;  // 存储学生信息
    
    int option = -1;
    while (option != 0) {
        showMainMenu();
        cout << "请输入选项: ";
        cin >> option;
        
        switch (option) {
            case 1:
                // 执行添加学生信息操作
                break;
            case 2:
                // 执行修改学生信息操作
                break;
            case 3:
                // 执行删除学生信息操作
                break;
            case 4:
                // 执行查询学生信息操作
                break;
            case 5:
                // 执行统计学生信息操作
                break;
            case 6:
                // 执行显示学生信息操作
                break;
            case 0:
                cout << "程序已退出！" << endl;
                break;
            default:
                cout << "无效选项！" << endl;
                break;
        }
    }
    
    return 0;
   }

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3. Program Implementation
Based on the above design, we can start to implement the student performance management program. During the implementation process, attention needs to be paid to input legality judgment and error handling.

Summary:
This article introduces how to use C language to write a simple student performance management program. Through reasonable design and implementation, we can realize the functions of adding, modifying, deleting, querying, statistics and displaying student scores through this program. Readers can expand and modify it according to their own needs to make the program more consistent with actual scenarios. Hope this article is helpful to readers!

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