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  1. #include <iostream>
  2. #include <fstream>
  3.  
  4. using namespace std;
  5.  
  6. class student {
  7. private:
  8.     int ScoreNum;
  9. 	int *Score;
  10. 	int totalScore;
  11. 	float ScoreAvg;
  12. public:
  13. 	student()
  14. 	{
  15. 		Score = 0;
  16. 		totalScore = 0;
  17. 		ScoreAvg = 0.0;
  18. 	}
  19. 	~student()
  20. 	{
  21. 		delete []Score;
  22. 	}
  23. 	void setNum(int ScoreNum)
  24. 	{
  25. 		this->ScoreNum = ScoreNum;
  26. 		Score = new int[ScoreNum];
  27. 	}
  28. 	int* getScore()
  29. 	{
  30. 		return Score;
  31. 	}
  32. 	void compute()
  33. 	{
  34. 		for(int i = 0; i < ScoreNum; i++) {
  35. 			totalScore += Score[i];
  36. 		}
  37. 		ScoreAvg = (float)totalScore / ScoreNum;
  38. 	}
  39. 	int getTotal()
  40. 	{
  41. 		return totalScore;
  42. 	}
  43. 	float getAvg()
  44. 	{
  45. 		return ScoreAvg;
  46. 	}
  47. };
  48.  
  49. void readScore(student *&allStudent,int &studentNum,int &ScoreNum)
  50. {
  51. 	ifstream iFile("score.txt");
  52. 	iFile >> studentNum >> ScoreNum;
  53. 	allStudent = new student[studentNum];
  54. 	for(int i = 0; i < studentNum; i++) {
  55. 		allStudent[i].setNum(ScoreNum);
  56. 		for(int j = 0; j < ScoreNum; j++){
  57. 			iFile >> allStudent[i].getScore()[j];
  58. 		}
  59. 		allStudent[i].compute();
  60. 	}
  61. 	iFile.close();
  62. }
  63.  
  64. void display(student *allStudent,int studentNum,int ScoreNum)
  65. {
  66. 	int sum = 0;
  67. 	for(int i = 0; i < studentNum; i++){
  68. 		cout << "student" << i+1
  69. 			<< "-> total=" << allStudent[i].getTotal()
  70. 			<< ",avg=" << allStudent[i].getAvg() << endl;
  71. 		sum+= allStudent[i].getTotal();
  72. 	}
  73. 	cout << "total = " << sum << ", avg = " << (float)sum / (studentNum*ScoreNum);
  74. }
  75.  
  76. int main()
  77. {
  78. 	student *allStudent;
  79. 	int studentNum,ScoreNum;
  80. 	readScore(allStudent,studentNum,ScoreNum);
  81. 	display(allStudent,studentNum,ScoreNum);
  82. 	delete []allStudent;
  83. 	return 0;
  84. }
Runtime error #stdin #stdout #stderr 0s 4052KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
https://ideone.com/U6Odt4
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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