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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class StudentGradesInfoWrapper;
  5.  
  6. class StudentGradesInfo {
  7. private:
  8.     static int cnt;
  9.     string student_name;
  10.     string student_id;
  11.     vector<string> course_names;
  12.     vector<double> grades;
  13.  
  14. public:
  15.     friend class StudentGradesInfoWrapper;
  16.     static int total_prints;
  17.  
  18.     StudentGradesInfo(string name, string id) : student_name(name), student_id(id) {
  19.         cnt++;
  20.     }
  21.  
  22.     double GetGrade(double grade) {
  23.         if (grade < 0 || grade > 100) {
  24.             cout << "Invalid grade entered.\n";
  25.             return -1;
  26.         }
  27.         return grade;
  28.     }
  29.  
  30.     bool AddGrade(double grade, string course_name) {
  31.         grade = GetGrade(grade);
  32.         if (grade == -1) return false;
  33.  
  34.         for (auto course : course_names) {
  35.             if (course == course_name) {
  36.                 cout << "Course already exists.\n";
  37.                 return false;
  38.             }
  39.         }
  40.         grades.push_back(grade);
  41.         course_names.push_back(course_name);
  42.         return true;
  43.     }
  44.  
  45.     string getId() {
  46.         return student_id;
  47.     }
  48.  
  49.     void PrintAllCourses() {
  50.         total_prints++;
  51.         cout << "Grades for student: " << student_id << "\n";
  52.         for (size_t i = 0; i < course_names.size(); ++i)
  53.             cout << course_names[i] << " = " << grades[i] << "\n";
  54.  
  55.         cout << "-------------------------------------\n";
  56.     }
  57.  
  58.     int getCourseTotalCount() {
  59.         return course_names.size();
  60.     }
  61.  
  62.     string getCourseName_Grade(int idx) {
  63.         if (idx < 0 || idx >= (int)course_names.size()) {
  64.             return "invalid";
  65.         }
  66.         string ans = course_names[idx] + "_" + to_string(grades[idx]);
  67.         return ans;
  68.     }
  69.  
  70.     string get_total_gradesSum() {
  71.         double sum = 0;
  72.         double total = getCourseTotalCount() * 100.0;
  73.         for (size_t i = 0; i < grades.size(); ++i) {
  74.             sum += grades[i];
  75.         }
  76.         string ans = to_string((int)sum) + "/" + to_string((int)total);
  77.         return ans;
  78.     }
  79. };
  80.  
  81. int StudentGradesInfo::total_prints = 0;
  82. int StudentGradesInfo::cnt = 0;
  83.  
  84. class StudentGradesInfoWrapper {
  85. public:
  86.  
  87.     string name, id;
  88.     StudentGradesInfo obj;
  89.  
  90.     StudentGradesInfoWrapper() = default;
  91.  
  92.     StudentGradesInfoWrapper(string name, string id) : name(name), id(id), obj(name, id) {}
  93.  
  94.     bool add_grade(double grade, string course_n) {
  95.         return obj.AddGrade(grade, course_n);
  96.     }
  97.  
  98.     string getTotalGradeSuM() {
  99.         return obj.get_total_gradesSum();
  100.     }
  101.  
  102.     void print() {
  103.         obj.PrintAllCourses();
  104.     }
  105.  
  106.     int getNumberOfPrints() {
  107.         return StudentGradesInfo::total_prints;
  108.     }
  109.  
  110.     static int totalStudents() {
  111.         return StudentGradesInfo::cnt;
  112.     }
  113. };
  114.  
  115.  
  116.  
  117. int main() {
  118.     StudentGradesInfoWrapper st1("Mostafa", "5000123");
  119.     st1.add_grade(70, "Math");
  120.     st1.add_grade(70, "Programming 1");
  121.     st1.add_grade(85, "Programming 2");
  122.  
  123.     st1.print();
  124.  
  125.     StudentGradesInfoWrapper st2("Manar", "5000193");
  126.     st2.add_grade(75, "Math");
  127.     st2.add_grade(77, "Programming 1");
  128.     st2.add_grade(95, "Programming 2");
  129.  
  130.     st2.print();
  131.     st2.print();
  132.     st2.print();
  133.  
  134.     cout << st1.getTotalGradeSuM() << "\n";
  135.     cout << st2.getTotalGradeSuM() << "\n";
  136.  
  137.     cout << "Number of Printings : " << StudentGradesInfo::total_prints << endl;
  138.     cout << "Number of Students : " << StudentGradesInfoWrapper::totalStudents() << endl;
  139.     cout << "Bye\n";
  140.  
  141.     return 0;
  142. }
  143.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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Grades for student: 5000123
Math = 70
Programming 1 = 70
Programming 2 = 85
-------------------------------------
Grades for student: 5000193
Math = 75
Programming 1 = 77
Programming 2 = 95
-------------------------------------
Grades for student: 5000193
Math = 75
Programming 1 = 77
Programming 2 = 95
-------------------------------------
Grades for student: 5000193
Math = 75
Programming 1 = 77
Programming 2 = 95
-------------------------------------
225/300
247/300
Number of Printings : 4
Number of Students : 2
Bye
https://ideone.com/rujb1j
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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