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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct SoPhuc {
  5.     double thuc, ao;
  6. };
  7.  
  8. SoPhuc Cong(SoPhuc a, SoPhuc b) {
  9.     return {a.thuc + b.thuc, a.ao + b.ao};
  10. }
  11.  
  12. SoPhuc Tru(SoPhuc a, SoPhuc b) {
  13.     return {a.thuc - b.thuc, a.ao - b.ao};
  14. }
  15.  
  16. SoPhuc Nhan(SoPhuc a, SoPhuc b) {
  17.     return {(a.thuc * b.thuc) - (a.ao * b.ao), (a.thuc * b.ao) + (b.thuc * a.ao)};
  18. }
  19.  
  20. void HienThi(SoPhuc a) {
  21.     if (a.thuc != 0) cout << a.thuc;
  22.     if (a.ao != 0) {
  23.         if (a.ao == -1) {
  24.             cout << (a.thuc != 0 ? " - i" : "-i");
  25.         } else if (a.ao == 1) {
  26.             cout << (a.thuc != 0 ? " + i" : "i");
  27.         } else {
  28.             if (a.thuc != 0) {
  29.                 cout << (a.ao > 0 ? " + " : " - ") << abs(a.ao) << "i";
  30.             } else {
  31.                 cout << a.ao << "i";
  32.             }
  33.         }
  34.     } else if (a.thuc == 0) {
  35.         cout << "0";
  36.     }
  37.     cout << '\n';
  38. }
  39.  
  40. void Input(SoPhuc &a) {
  41.     cin >> a.thuc >> a.ao;
  42. }
  43. int main() {
  44.     int n;
  45.     cin >> n;
  46.     while (n--) {
  47.         SoPhuc a, b;
  48.         Input(a);
  49.         Input(b);
  50.  
  51.         HienThi(Cong(a, b));
  52.         HienThi(Tru(a, b));
  53.         HienThi(Nhan(a, b));
  54.     }
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0s 5280KB
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https://ideone.com/ZfJz3O
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
secret

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