increment function

kakashi316 (156)
Id like state that i am aware that ive posted this code before in another thread but im having a different issue. Im trying to increment certain points by a given amount but when i do it doesnt work.

heres my code:

header:
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#ifndef location_H
#define location_H
#include <iostream>
class location
{
  
   friend std::istream& operator>>(std::istream & , location &);
   friend std::ostream& operator<<(std::ostream & , location &);
      
      private:
              int row;
              int colm;
              
      public:
             location (int=0,int=0);
             void assign(int, int);
             location operator =(location);
             bool operator ==(location);
             int inc(int, int);
             int Row(){return row;};
             int Colm(){return colm;};
            // bool WithinRectangle(Location, Location); 
};
#endif


implementation
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#include "location.h"


location::location(int r,int c)
{
           row=r;
           colm=c;
}
void location::assign(int r,int c)
{
           row=r;
           colm=c;
}
location location::operator = (location y)
{
         row = y.row;
         colm = y.colm;
         return y;
}
bool  location::operator == (location z)
{
     return((row==z.row)&&(colm==z.colm));
}
//bool location::WithinRectangle(location x, location y)
//{
//     location x= (1,1);
//     location y= (10,10);
//     
//)
int location::inc(int a, int b)
{
    row=+a;
    colm=+b;
    return ((row)&&(colm));
}  
std::istream& operator>>(std::istream &input , location &x)
{
         char a;
         input>>a
               >>x.row
               >>a
               >>x.colm
               >>a;
         return input;
} 
std::ostream& operator<<(std::ostream &output ,  location &x)
{
         output<<'('
               <<x.row
               <<','
               <<x.colm
               <<')';
         return output;
}


main program:
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#include <iostream>
#include "location.h"


int main()
{
    
    location x,y(1),z(1,2);
    
    std::cout<<"testing constructor"<<std::endl;
    std::cout<<"x="<<x<<std::endl;
    std::cout<<"y="<<y<<std::endl;
    std::cout<<"z="<<z<<std::endl;
    
    std::cout<<"testing assign function"<<std::endl;
    x.assign(3,7);
    y.assign(4,3);
    std::cout<<"Enter a location for z (r,c)";
    std::cin>>z;
    
    std::cout<<"x="<<x<<std::endl;
    std::cout<<"y="<<y<<std::endl;
    std::cout<<"z="<<z<<std::endl;
    
    std::cout<<"testing == function"<<std::endl;
    if (x==y)
       std::cout<<"these points are equal"<<std::endl;
    else
       std::cout<<"these points are not equal"<<std::endl;
    
   z=y;
    
    std::cout<<"testing = function"<<std::endl;
    std::cout<<"z="<<z<<std::endl;
    
    
    x=x.Row();
    y=y.Row();
    z=z.Row();
    
    std::cout<<"testing row function"<<std::endl;   
    std::cout<<"x row="<<x<<std::endl; 
    std::cout<<"y row="<<y<<std::endl;
    std::cout<<"z row="<<z<<std::endl;    
   
   x.assign(3,7);
   y.assign(4,3);
   z.assign(4,3);
    
    x=x.Colm();
    y=y.Colm();
    z=z.Colm(); 
    
    std::cout<<"testing colm function"<<std::endl;   
    std::cout<<"x column="<<x<<std::endl; 
    std::cout<<"y column="<<y<<std::endl;
    std::cout<<"z column="<<z<<std::endl;  
    
    
   //std::cout<<"testing Withinrectangle function"<<std::endl;
   
    
    x=x.inc(1,2);
    y=y.inc(1,2);
    z=z.inc(1,2);   
    
    std::cout<<"testing inc function"<<std::endl;
    std::cout<<"x="<<x<<std::endl;
    std::cout<<"y="<<y<<std::endl;
    std::cout<<"z="<<z<<std::endl;
    
    system("pause");
    return 0;
}


note:ignore the commented section.its a function i havent worked on yet.

I know my problem is my return value for the inc function itself,but im not sure what to do on that front.If someone can help me i would appreciate it.
Zhuge (4664)
I think you probably want += instead of =+.
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