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  1. #include <iostream>
  2. using namespace std;
  3. using ll = long long;
  4.  
  5. ll gcd(ll a, ll b) {
  6.     while (b != 0) {
  7.         ll tmp = b;
  8.         b = a % b;
  9.         a = tmp;
  10.     }
  11.     return a;
  12. }
  13. struct PhanSo {
  14.     ll tu, mau;
  15.  
  16.     void rutgon() {
  17.         ll div = gcd(abs(tu), abs(mau));
  18.         tu /= div;
  19.         mau /= div;
  20.         if (mau < 0) {
  21.             tu = -tu; mau = -mau;
  22.         }
  23.     }
  24. };
  25.  
  26. PhanSo Cong (PhanSo a, PhanSo b) {
  27.     return {a.tu * b.mau + b.tu * a.mau, a.mau * b.mau};
  28. }
  29.  
  30. PhanSo Tru (PhanSo a, PhanSo b) {
  31.     return {a.tu * b.mau - b.tu * a.mau, a.mau * b.mau};
  32. }
  33.  
  34. PhanSo Nhan(PhanSo a, PhanSo b) {
  35.     return {a.tu * b.tu, a.mau * b.mau};
  36. }
  37.  
  38. PhanSo Chia (PhanSo a, PhanSo b) {
  39.     return {a.tu * b.mau, a.mau * b.tu};
  40. }
  41.  
  42. void HienThi (PhanSo p) {
  43.     p.rutgon();
  44.     cout << p.tu << '/' << p.mau << ' ';
  45. }
  46.  
  47. void Input(PhanSo &p) {
  48.     cin >> p.tu >> p.mau;
  49. }
  50.  
  51. int main() {
  52.     PhanSo A, B;
  53.     Input(A); Input(B);
  54.  
  55.     HienThi(Cong(A, B));
  56.     HienThi(Tru(A, B));
  57.     HienThi(Nhan(A, B));
  58.     HienThi(Chia(A, B));
  59. }
  60.  
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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-1/0 -1/0 -1/0 -1/0
https://ideone.com/p2CXHt
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
secret

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