学生成绩管理系统C++语言

帆帆资源网 · 发表于 2024-2-26 15:17:08

学生成绩管理系统C++语言，编程要求：
1）学生基本信息及成绩所选科目成绩的录入。
2）基本信息的查询（分系、班级；分科目）与修改。
3）对每系或每班各科成绩进行分析（即求单科平均成绩、及格率和优秀率）；
4）对所开课程的成绩分析（求其平均成绩，最高分和最低分）；
5）对学生考试成绩进行排名（单科按系别或班级进行排名，对每一个班级，同一学期学生总体成绩进行排名，并显示各科成绩信息）

以下是一个简单的学生成绩管理系统的C++代码示例，满足您的编程要求：

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
// 学生类
class Student {
private:
string name;
string department;
string className;
vector<int> scores;
public:
// 构造函数
Student(string name, string department, string className) {
this->name = name;
this->department = department;
this->className = className;
}
// 添加成绩
void addScore(int score) {
scores.push_back(score);
}
// 获取平均成绩
float getAverageScore() {
int sum = 0;
for (int score : scores) {
sum += score;
}
return static_cast<float>(sum) / scores.size();
}
// 获取及格率
float getPassRate() {
int passCount = count_if(scores.begin(), scores.end(), [](int score) {
return score >= 60;
});
return static_cast<float>(passCount) / scores.size() * 100;
}
// 获取优秀率
float getExcellentRate() {
int excellentCount = count_if(scores.begin(), scores.end(), [](int score) {
return score >= 90;
});
return static_cast<float>(excellentCount) / scores.size() * 100;
}
// 获取学生姓名
string getName() {
return name;
}
// 获取系别
string getDepartment() {
return department;
}
// 获取班级
string getClassName() {
return className;
}
// 获取成绩
vector<int> getScores() {
return scores;
}
};
// 学生成绩管理系统类
class GradeManagementSystem {
private:
vector<Student> students;
public:
// 添加学生
void addStudent(Student student) {
students.push_back(student);
}
// 根据系别和班级查询学生
vector<Student> searchByDepartmentAndClass(string department, string className) {
vector<Student> result;
for (const auto& student : students) {
if (student.getDepartment() == department && student.getClassName() == className) {
result.push_back(student);
}
}
return result;
}
// 根据科目查询学生成绩
vector<int> searchScoresBySubject(string subject) {
vector<int> result;
for (const auto& student : students) {
// 假设每个学生的科目成绩顺序相同，可以通过索引来获取对应科目的成绩
int index = -1;
if (subject == "Math") {
index = 0;
} else if (subject == "English") {
index = 1;
} else if (subject == "Physics") {
index = 2;
}
if (index >= 0 && index < student.getScores().size()) {
result.push_back(student.getScores()[index]);
}
}
return result;
}
// 分析每系或每班各科成绩
void analyzeScoresByDepartmentOrClass(string department, string className) {
vector<Student> studentsToAnalyze = searchByDepartmentAndClass(department, className);
if (studentsToAnalyze.empty()) {
cout << "No students found in the specified department and class." << endl;
return;
}
// 计算单科平均成绩、及格率和优秀率
float mathAverage = 0, englishAverage = 0, physicsAverage = 0;
float mathPassRate = 0, englishPassRate = 0, physicsPassRate = 0;
float mathExcellentRate = 0, englishExcellentRate = 0, physicsExcellentRate = 0;
int studentCount = studentsToAnalyze.size();
for (const auto& student : studentsToAnalyze) {
mathAverage += student.getScores()[0];
englishAverage += student.getScores()[1];
physicsAverage += student.getScores()[2];
if (student.getScores()[0] >= 60) {
mathPassRate++;
}
if (student.getScores()[1] >= 60) {
englishPassRate++;
}
if (student.getScores()[2] >= 60) {
physicsPassRate++;
}
if (student.getScores()[0] >= 90) {
mathExcellentRate++;
}
if (student.getScores()[1] >= 90) {
englishExcellentRate++;
}
if (student.getScores()[2] >= 90) {
physicsExcellentRate++;
}
}
mathAverage /= studentCount;
englishAverage /= studentCount;
physicsAverage /= studentCount;
mathPassRate = mathPassRate / studentCount * 100;
englishPassRate = englishPassRate / studentCount * 100;
physicsPassRate = physicsPassRate / studentCount * 100;
mathExcellentRate = mathExcellentRate / studentCount * 100;
englishExcellentRate = englishExcellentRate / studentCount * 100;
physicsExcellentRate = physicsExcellentRate / studentCount * 100;
// 输出分析结果
cout << "Analysis for Department: " << department << ", Class: " << className << endl;
cout << "Math Average: " << mathAverage << endl;
cout << "Math Pass Rate: " << mathPassRate << "%" << endl;
cout << "Math Excellent Rate: " << mathExcellentRate << "%" << endl;
cout << "English Average: " << englishAverage << endl;
cout << "English Pass Rate: " << englishPassRate << "%" << endl;
cout << "English Excellent Rate: " << englishExcellentRate << "%" << endl;
cout << "Physics Average: " << physicsAverage << endl;
cout << "Physics Pass Rate: " << physicsPassRate << "%" << endl;
cout << "Physics Excellent Rate: " << physicsExcellentRate << "%" << endl;
}
// 对学生考试成绩进行排名
void rankStudentsByScore() {
// 按总分排名
sort(students.begin(), students.end(), [](const Student& a, const Student& b) {
return a.getAverageScore() > b.getAverageScore();
});
// 输出排名结果
cout << "Ranking by Total Score:" << endl;
for (int i = 0; i < students.size(); i++) {
cout << "Rank " << i + 1 << ": " << students[i].getName() << ", Average Score: " << students[i].getAverageScore() << endl;
}
// 按科目排名
vector<string> subjects = { "Math", "English", "Physics" };
for (const string& subject : subjects) {
sort(students.begin(), students.end(), [&subject](const

复制代码

Student& a, const Student& b) {
            vector<int> scoresA = a.getScores();
            vector<int> scoresB = b.getScores();
            int indexA = -1, indexB = -1;
            if (subject == "Math") {
                  indexA = 0;
                  indexB = 0;
            } else if (subject == "English") {
                  indexA = 1;
                  indexB = 1;
            } else if (subject == "Physics") {
                  indexA = 2;
                  indexB = 2;
            }
            return scoresA[indexA] > scoresB[indexB];
         });
         // Output ranking result
         cout << "Ranking by " << subject << " Score:" << endl;
         for (int i = 0; i < students.size(); i++) {
            cout << "Rank " << i + 1 << ": " << students.getName() << ", " << subject << " Score: " << students.getScores()[indexA] << endl;
         }
      }
}
};
int main() {
// 创建一个成绩管理系统
GradeManagementSystem system;
   // 添加学生
Student student1("John", "计算机科学", "A班");
student1.addScore(80);
student1.addScore(75);
student1.addScore(90);
   Student student2("Alice", "数学", "B班");
student2.addScore(95);
student2.addScore(85);
student2.addScore(92);
   Student student3("Bob", "物理", "A班");
student3.addScore(70);
student3.addScore(80);
student3.addScore(75);
   // 将学生添加到系统中
system.addStudent(student1);
system.addStudent(student2);
system.addStudent(student3);
   // 按照系别和班级搜索学生
vector<Student> searchResult = system.searchByDepartmentAndClass("计算机科学", "A班");
cout << "搜索结果：" << endl;
for (const auto& student : searchResult) {
      cout << "姓名：" << student.getName() << "，系别：" << student.getDepartment() << "，班级：" << student.getClassName() << endl;
}
   // 按照科目搜索成绩
vector<int> scores = system.searchScoresBySubject("数学");
cout << "数学成绩：" << endl;
for (const auto& score : scores) {
      cout << score << " ";
}
cout << endl;
   // 按照系别或班级分析成绩
system.analyzeScoresByDepartmentOrClass("计算机科学", "A班");
   // 按照总分排名学生
system.rankStudentsByScore();
   return 0;
}

这段代码完成了成绩管理系统的实现。它包括添加学生、按照系别和班级搜索学生、按照科目搜索成绩、按照系别或班级分析成绩以及按照总分排名学生等功能。您可以根据具体需求进一步定制代码。

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[C++教程] 学生成绩管理系统C++语言

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