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  1. #include <iostream>
  2. #include <string>
  3. #include <time.h>
  4. using namespace std;
  5.  
  6. 	class Student
  7. 	{
  8. 	private:
  9. 	  string studentName;
  10. 	  int* grades;
  11. 	  int size;
  12. 	public:
  13.  
  14. 	  Student()
  15. 	  {
  16. 		studentName = "John";
  17. 		size = 0;
  18. 		grades = nullptr;
  19. 	  }
  20.  
  21. 	  void setName(string n)
  22. 	  {
  23. 		studentName = n;
  24. 	  }
  25.  
  26. 	  void setSize(int s)
  27. 	  {
  28. 		  size = s;
  29. 	  }
  30.  
  31.  
  32. 	  string getName()
  33. 	  {
  34. 		return studentName;
  35. 	  }
  36.  
  37. 	  int getSize()
  38. 	  {
  39. 		return size;
  40. 	  }
  41.  
  42. 	  int* setGrades()
  43. 	  {
  44. 		  grades = new int [getSize()]; // allocates memory for array
  45. 		  for(int x = 0; x < size;x++) // loop to set values
  46. 		  {
  47. 			grades[x] = (rand() % 100); //from 0 - 100
  48. 		  }
  49.  
  50. 		  return grades;
  51. 	  }
  52.  
  53. 	  void displayGrades()
  54. 	  {
  55. 		  int *gradesArr = setGrades();
  56.  
  57. 		  for (int i = 0; i < size; i++)
  58. 		  {
  59. 			  cout << "Grades: " << gradesArr[i] << endl;
  60. 		  }
  61. 	  }
  62.  
  63.  
  64. 	  int getAverage()
  65. 	  {
  66. 		  int average = 0;
  67.  
  68. 		for(int i = 0; i < size; i++)
  69. 		{
  70. 		  average += grades[i] / size;
  71. 		}
  72. 		return average;
  73. 	  }
  74.  
  75.  
  76.   void displayData() // displays name and grade of individual
  77.   {
  78.     cout << "Name: " << getName() << endl;
  79. 	displayGrades();
  80.     cout << "Average: " << getAverage() << endl;
  81.   }
  82.  
  83.   ~Student() // releases the array
  84.   {
  85.     delete[] grades;
  86.   }
  87. };
  88.  
  89.  
  90. void bubbleSort(Student studentArr[], int tempSize); // protype function
  91.  
  92.  
  93.  
  94.  
  95. int main()
  96. {
  97.   srand(time(0)); //seeds rand
  98.   Student *studentArr = nullptr; //array of object Student
  99.   int amount;
  100.  
  101.   string tempName;// temp arrayys to set values
  102.   int tempSize;
  103.  
  104.   cout << "Enter the amount of students: " << endl;
  105.   cin >> amount;
  106.  
  107.   studentArr = new Student[amount]; //allocates array memory
  108.  
  109.  
  110.   for(int i = 0; i < amount;i++) // asks for usr name and grade
  111.   {
  112.     cout << "Enter the students name: " << endl;
  113.     cin >> tempName;
  114.  
  115.     cout << "Enter how many grades per student: " << endl;
  116.     cin >>  tempSize;
  117.  
  118.     studentArr[i].setName(tempName); //sets name from temporary variable
  119.     studentArr[i].setSize(tempSize);
  120.   }
  121.   bubbleSort(studentArr, tempSize);
  122.  
  123.   for(int x = 0; x < amount;x++)
  124.   {
  125.     studentArr[x].displayData(); // displays students and grades
  126.   }
  127.  
  128.   delete[] studentArr; //prevents memory leaks
  129.   studentArr = nullptr;
  130.  
  131.   return 0;
  132. }
  133.  
  134.  
  135. void bubbleSort(Student studentArr[],int tempSize)
  136. {
  137.  
  138. 	for (int i = 0; i < tempSize; i++)
  139. 	{
  140. 		for (int x = 0; x < tempSize - i - 1; x++)
  141. 		{
  142. 			// if element is larget than
  143. 			if (studentArr[x].getAverage() > studentArr[x + 1].getAverage())
  144. 			{
  145. 				// do swap
  146. 				Student temp = studentArr[x];
  147.  
  148. 				studentArr[x] = studentArr[x + 1];
  149.  
  150. 				studentArr[x + 1] = temp;
  151.  
  152. 			}
  153.  
  154. 		}
  155.  
  156. 	}
  157.  
  158. }
  159.  
Runtime error #stdin #stdout #stderr 0s 80768KB
comments ()
stdin
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Standard input is empty
stdout
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Enter the amount of students:
stderr
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terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
https://ideone.com/QMW7xb
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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