Hello!
I am facing a complex problem with a 2 dimensional array. I would be grateful if someone could help.
Here is my code:

Qt Code: 
  1. std::string str1 = "ABABA";
  2. std::string str2 = "BBBBBAAA";
  3. double diag;
  4. typedef std::pair<double, Direction> Cell;
  5. matrix<Cell> m (str1.size()+1, str2.size()+1);
  6.  
  7. // Initialisation.
  8.     for(size_t i=0;i<m.size1();++i)     
  9.     {
  10.         m.at_element(i, 0).first = static_cast<float>(i)*(-1.f);     
  11.     }
  12.     for(size_t j=1;j<m.size2();++j)      
  13.     {
  14.         m.at_element(0, j).first = static_cast<float>(j)*(-1.f);       
  15.     }
  16. // Operations
  17.     for(size_t i = 1; i<m.size1(); ++i)
  18.     {
  19.         for(size_t j = 1; j<m.size2(); ++j)
  20.         {            
  21.                 diag = m.at_element(i-1, j-1).first;
  22.                 diag += 1;            
  23.         }
  24.    }
  25.  
  26. //Display
  27. std::cout<<"    ";
  28. 	for(size_t j=0;j<m.size2 ();++j)
  29.        {
  30.          std::cout << str2[j] << " ";
  31.        } 
  32.        std::cout << "\n";
  33.  
  34. 	for(size_t i=0;i<m.size1 ();++i)
  35.         {
  36. 		if(i==0)
  37.         {		
  38.            std::cout <<"  ";
  39.         }
  40.         else
  41.         {
  42.           std::cout << str1[i-1]<<" ";
  43.         }
  44.  
  45. 		for(size_t j=0;j<m.size2();++j)
  46.                {
  47. 			std::cout << m.at_element(i,j).first<<" ";
  48. 		}
  49. 		std::cout <<"\n";
  50.    }
To copy to clipboard, switch view to plain text mode 

The compilation is OK, but at the execution, I have only zeros in my cells.

Question: What could be the source of this mistake?
I would grateful to anyone you could help.

Thanks in advance.