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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. struct Fraction {
  5.     long long numerator;
  6.     long long denominator;
  7. };
  8.  
  9. long long gcd(long long a, long long b) {
  10.     while (b != 0) {
  11.         long long temp = b;
  12.         b = a % b;
  13.         a = temp;
  14.     }
  15.     return a;
  16. }
  17.  
  18. Fraction simplifyFraction(Fraction frac) {
  19.     long long commonGCD = gcd(abs(frac.numerator), frac.denominator);
  20.     frac.numerator /= commonGCD;
  21.     frac.denominator /= commonGCD;
  22.     return frac;
  23. }
  24.  
  25. int main() {
  26.     long long a, b, c, d;
  27.     char ch, o;
  28.  
  29.     while (std::cin >> a >> ch >> b >> o >> c >> ch >> d) {
  30.         Fraction result;
  31.  
  32.         if (o == '+') {
  33.             result.numerator = a * d + b * c;
  34.             result.denominator = b * d;
  35.         } else if (o == '-') {
  36.             result.numerator = a * d - b * c;
  37.             result.denominator = b * d;
  38.         }
  39.  
  40.         Fraction simplifiedResult = simplifyFraction(result);
  41.  
  42.         std::cout << simplifiedResult.numerator << "/" << simplifiedResult.denominator << std::endl;
  43.     }
  44.  
  45.     return 0;
  46. }
Success #stdin #stdout 0s 5304KB
comments (?)
stdin 
1/2 + 3/4
4/5 - 7/3
3/2 + 5/6
7/6 - 1/6
3/2 - 3/2
stdout 
5/4
-23/15
7/3
1/1
0/1
https://ideone.com/3A1y04
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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