C++关系运算符重载_C/C++实例代码-得得之家

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#include <iostream>

using namespace std;

class distance {
   private:
      int feet;             // 0 to infinite
      int inches;           // 0 to 12

   public:
      // required constructors
      distance() {
         feet = 0;
         inches = 0;
      }
      distance(int f, int i) {
         feet = f;
         inches = i;
      }

      // method to display distance
      voID displaydistance() {
         cout << "F: " << feet << " I:" << inches <<endl;
      }

      // overloaded minus (-) operator
      distance operator- () {
         feet = -feet;
         inches = -inches;
         return distance(feet, inches);
      }

      // overloaded < operator
      bool operator <(const distance& d) {
         if(feet < d.feet) {
            return true;
         }
         if(feet == d.feet && inches < d.inches) {
            return true;
         }

         return false;
      }
};

int main() {
   distance D1(11, 10), D2(5, 11);

   if( D1 < D2 ) {
      cout << "D1 is less than D2 " << endl;
   } else {
      cout << "D2 is less than D1 " << endl;
   }

   return 0;
}

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C++关系运算符重载

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