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实验目的:
1.理解类和对象的概念,掌握声明类和定义对象的方法
2.掌握构造函数和析构函数的实现方法 3.初步掌握使用类和对象编制C++程序实验内容:
创建一个Score类,完成以下功能:
1.连续输入多位学生的float成绩(成绩=科目A成绩+科目B成绩+科目C成绩); 2.学生数目可以由用户自定义(默认为2个,最多为100个。提示:使用变量。); 3.显示每位同学的每科成绩和平均分; 4.显示每门科目的平均成绩; 5.对每门成绩进行排序并由高到低显示;O对整个项目(所有源代码)进行打包。6.画流程图
流程图:
代码:
#include#include using namespace std; class StudentScore {public: StudentScore() {student_nr = 2;} StudentScore(int student_count) {student_nr = student_count;} void InputStudentNameAndScore() { for (int student_id = 0; student_id < student_nr; student_id++) { cout << "请输入学生姓名:" << endl; cin >> name_array[student_id]; cout << "请输入科目A成绩:" << endl; cin >> score_table[student_id][1]; cout << "请输入科目B成绩:" << endl; cin >> score_table[student_id][2]; cout << "请输入科目C成绩:" << endl; cin >> score_table[student_id][3]; } } void ShowStudentNameAndScore() { for (int student_id = 0; student_id < student_nr; student_id++) { cout << "姓名:" << name_array[student_id] << "科目A成绩:" << score_table[student_id][1] << "科目B成绩:" << score_table[student_id][2] << "科目C成绩:" << score_table[student_id][3] << endl; } } void ShowStdentAvgScore(int student_id) { cout << "姓名:" << name_array[student_id] << "平均成绩:" << (score_table[student_id][1] + score_table[student_id][2] + score_table[student_id][3]) / 3 << endl; } void ShowCourseAvgScore(string course_name) { float sum=0; cout << "课程名称:" << course_name << "平均成绩:"; for (int student_id = 0; student_id < student_nr; student_id++) { sum += score_table[student_id][1]; } cout << sum / student_nr << endl; } void orderScoreByCourse(string course_name) { string v; cout << "课程名称:" << course_name << endl; for (int student_id = 0,t; student_id < student_nr-1; student_id++) for (int sco = 0; sco < student_nr - 1 - student_id; sco++) { t = score_table[sco][2]; score_table[sco][2] = score_table[sco + 1][2]; score_table[sco + 1][2] = t; v= name_array[sco]; name_array[sco] = name_array[sco + 1]; name_array[sco + 1] = v; } for (int student_id = 0; student_id < student_nr; student_id++) cout << "姓名:" << name_array[student_id] << "成绩:" << score_table[student_id][2] << endl; }private: float score_table[100][3], score_table1[100][3]; string name_array[100], name_array1[100]; int student_nr; };int main(){ StudentScore x; x.InputStudentNameAndScore(); x.ShowStudentNameAndScore(); x.ShowStdentAvgScore(1); x.ShowCourseAvgScore("A"); x.orderScoreByCourse("B"); return 0;}
运行结果:
请输入学生姓名:徐元请输入科目A成绩:90请输入科目B成绩:92请输入科目C成绩:93.5请输入学生姓名:孔政请输入科目A成绩:91请输入科目B成绩:95请输入科目C成绩:93姓名:徐元科目A成绩:90科目B成绩:92科目C成绩:93.5姓名:孔政科目A成绩:91科目B成绩:95科目C成绩:93姓名:孔政平均成绩:93课程名称:A平均成绩:90.5课程名称:B姓名:孔政成绩:95姓名:徐元成绩:92
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