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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Bai1 {
  5. private:
  6.     double* arr;
  7.     int sl;
  8. public:
  9.     ~Bai1() {
  10.         delete[] arr;
  11.         sl = 0;
  12.         arr = nullptr;
  13.     }
  14.     Bai1(int s = 0) {
  15.         sl = s;
  16.         arr = new double[sl];
  17.     }
  18.     void Nhap() {
  19.         cin >> sl;
  20.         arr = new double[sl];
  21.         for (int i = 0; i < sl; i++) {
  22.             cin >> arr[i];
  23.         }
  24.     }
  25.     void Xuat() {
  26.         for (int i = 0; i < sl; i++) {
  27.             cout << arr[i] << " ";
  28.         }
  29.         cout << "\n";
  30.     }
  31.     void Tim(double x) {
  32.         bool tim_thay = false;
  33.         for (int i = 0; i < sl; i++) {
  34.             if (arr[i] == x) {
  35.                 tim_thay = true;
  36.                 break;
  37.             }
  38.         }
  39.         if (tim_thay) cout << "Ton tai " << x << " trong mang!\n";
  40.         else cout << "Khong ton tai " << x << " trong mang!\n";
  41.     }
  42.     void Tong() {
  43.         double tong = 0;
  44.         for (int i = 0; i < sl; i++) {
  45.             tong += arr[i];
  46.         }
  47.         cout << "Tong la " << tong << "\n";
  48.     }
  49.     void Thong_ke() {
  50.         for (int i = 0; i < sl; i++) {
  51.             bool tim_thay = false;
  52.             for (int j = 0; j < i; j++) {
  53.                 if (arr[i] == arr[j]) {
  54.                     tim_thay = true;
  55.                     break;
  56.                 }
  57.             }
  58.             if (!tim_thay) {
  59.                 int dem = 0;
  60.                 for (int j = i; j < sl; j++) {
  61.                     if (arr[i] == arr[j]) {
  62.                         dem++;
  63.                     }
  64.                 }
  65.                 cout << "So lan xuat hien cua " << arr[i] << " trong mang: " << dem << "\n";
  66.             }
  67.         }
  68.     }
  69. };
  70.  
  71. int main() {
  72.     Bai1 a;
  73.     a.Nhap();
  74.     a.Xuat();
  75.     double x; cin >> x;
  76.     a.Tim(x);
  77.     a.Tong();
  78.     a.Thong_ke();
  79.     return 0;
  80. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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Khong ton tai 4.64724e-310 trong mang!
Tong la 0
https://ideone.com/WCavmw
Lời giải Bài 1
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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