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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #include <iostream>
  5.  
  6. using namespace std;
  7.  
  8. namespace ALL_Vector { 
  9.  
  10.   class Vector {
  11.     public:
  12.       // Intitialize elem and sz before the actual function
  13.       Vector(int size) :elem {new double[size]}, sz {size} {};
  14.       ~Vector() {delete[] elem;};
  15.  
  16.       double& operator[](int i) {
  17.         return elem[i];
  18.       };
  19.       int size() {return sz;};
  20.     private:
  21.       double* elem;
  22.       int sz;
  23.   };
  24.  
  25.  
  26.   void print_product(Vector& y) {
  27.     double result {1};
  28.  
  29.     for (auto x = 0; x < y.size() ; x++){
  30.       if (y[x] > 0) {result *= y[x]; };
  31.     }
  32.  
  33.     cout << "The product of Vector y is: " << result << ", or so it would appear ;)\n";
  34.   } 
  35.  
  36. }
  37.  
  38.  
  39. /*
  40.   Self test of the Vector class.  
  41. */
  42.  
  43. int main(){  
  44.     ALL_Vector::Vector myVector(15);
  45.     cout << "The size of Vector y is: " << myVector.size() << "\n"; 
  46.     myVector[0] = 12;
  47.     myVector[2] = 7;
  48.     myVector[3] = 19;
  49.     myVector[4] = 2;
  50.  
  51.     ALL_Vector::print_product(myVector);
  52.  
  53.   return 0;
  54. }
Success #stdin #stdout 0s 3456KB
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Standard input is empty
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The size of Vector y is: 15
The product of Vector y is: 3192, or so it would appear ;)
https://ideone.com/ImpImv
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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