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  1. #include <iostream>
  2.  
  3. class rational {
  4.     public: 
  5.         rational( int iNum, int iDen ) : num( iNum ), den( iDen ) {}
  6.  
  7.         // ... 
  8.         operator double() { return (double)num / (double)den; }
  9.  
  10.     private: 
  11.         int num;
  12.         int den;
  13.     };
  14.  
  15.     int main()
  16.     {
  17.         rational r( 1, 2 );
  18.         double n = r;
  19.  
  20.         std::cout << r << std::endl; // output 0.5
  21.         return 0;
  22.     }
Success #stdin #stdout 0s 3340KB
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stdin
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Standard input is empty
stdout
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0.5
https://ideone.com/I0Oj66
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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