Vector operations

Discussion in 'C++' started by can342man, Aug 21, 2006.

  1. can342man

    can342man New Member

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    I have been wondering why a simple vector manipulation scheme as the one below is not valid. The compiler says that the multipilcation (*3.0) operation does not exist.

    I am not sure how to use the std::vector library for this purpose. Would that method work in which the function vVAdd() would return a vector type and allow the multiplication?

    Much appreciation if anyone can help.

    Code:
    #include <iostream>
    #include <fstream>
    using namespace std;
    
    //class for vectors
    class Vect {
    public: 
        double x, y, z;  // vector units
    };
    
    void vVAdd(Vect &v, Vect v1, Vect v2);
    
    int main ()
    {
     Vect t1, t2, t3, t4;
    
     t1.x = 4.0, t1.y = 5.5, t1.z = 7.1;
     t2.x = 3.6, t2.y = 4.8, t2.z = 3.6;   
        
     vVAdd(t3, t1, t2);
     t4 = t3*3.0;
     
     cout << t4.x << '\t' << t4.y << '\t' << t4.z << endl;
        
    }    
    
    void vVAdd(Vect &v, Vect v1, Vect v2)
    {  
       v.x = v1.x + v2.x;                                             
       v.y = v1.y + v2.y;
       v.z = v1.z + v2.z;
       
    return;
    }
    
     
  2. shabbir

    shabbir Administrator Staff Member

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    Welcome to G4EF. You probably posted the query in the wrong section. I have moved it at the correct place.

    You are operating on the object (*3.0) but that is allowed only when you have an overloaded operator.
     

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