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  1. #include <iostream>
  2. #include <malloc.h>
  3. using namespace std;
  4.  
  5. typedef struct
  6. {
  7. 	char id[9]; 
  8. 	char name[20];
  9. 	float Marks[3];
  10. 	float DTB; 	
  11. }Student;
  12.  
  13. void xeploai (Student S)
  14. {
  15. 	if (S.DTB >= 8) cout << "Gioi";
  16. 	else if (S.DTB >= 7) cout << "Kha";
  17. 	else if (S.DTB >= 5) cout << "Trung binh";
  18. 	else cout << "Yeu";
  19. }
  20.  
  21. void nhap_sv(Student &sv)
  22. {
  23. 	cout << "Nhap id: ";
  24. 	cin.get(sv.id, 9);
  25. 	cin.ignore();
  26. 	cout << "Nhap name: ";
  27. 	cin.get(sv.name, 20);
  28. 	cout << "Marks: baitap, giuaky, cuoiky: ";
  29. 	for (int i = 0; i < 3; i++)
  30. 	{
  31. 		cin >> sv.Marks[i];
  32. 	}
  33. 	sv.DTB = sv.Marks[0] * 0.25 + sv.Marks[1] * 0.25 + sv.Marks[2]*0.5;
  34. }
  35.  
  36. void nhapDanhSach_sv(Student* &sv, const int &n)
  37. {
  38. 	sv = (Student*)calloc(n, sizeof(Student));
  39. 	if (sv == NULL) return;
  40. 	for (int i = 0; i < n; i++)
  41. 	{
  42. 		nhap_sv(sv[i]);
  43. 	}
  44. }
  45.  
  46. void xuatDanhSach_sv(Student* &sv, const int &n)
  47. {
  48. 	if (sv == NULL) return;
  49. 	for (int i = 0; i < n; i++)
  50. 	{
  51. 		cout << "Thong tin sinh vien thu " << i + 1 << "\n";
  52. 		cout << "MSSV: " << sv[i].id << "\n";
  53. 		cout << "Ho va ten: " << sv[i].name << "\n";
  54. 		cout << "Diem so: Bai tap, giua ky, cuoi ky: " << "\n";
  55. 		for (int j = 0; j < 3; j++)
  56. 		{
  57. 			cout << sv[i].Marks[j] << "\t";
  58. 		}
  59. 		cout << "\nDiem trung binh: " << sv[i].DTB << "\n";
  60. 		cout << "Xep loai: \n";
  61. 		xeploai(sv[i]);
  62. 		cout << "\n";
  63. 	}
  64. }
  65.  
  66. Student* sv_pushback(Student* &sv, int &n)
  67. {
  68. 	void* p = sv;
  69. 	n++;
  70. 	sv = (Student*)realloc(p, n);
  71. 	nhap_sv(sv[n - 1]);
  72. 	return sv;
  73. }
  74.  
  75. int main()
  76. {
  77. 	Student* a;
  78. 	int n;
  79. 	cout << "Nhap so sinh vien n = ";
  80. 	cin >> n;
  81. 	nhapDanhSach_sv(a, n);
  82. 	xuatDanhSach_sv(a, n);
  83. 	return 0;
  84. }
Success #stdin #stdout 0s 5376KB
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stdin
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1
stdout
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Nhap so sinh vien n = Nhap id: Nhap name: Marks: baitap, giuaky, cuoiky: Thong tin sinh vien thu 1
MSSV: 
Ho va ten: 
Diem so: Bai tap, giua ky, cuoi ky: 
0	0	0	
Diem trung binh: 0
Xep loai: 
Yeu
https://ideone.com/NVse6E
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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