Thanks, I', really into your katas! I hope that they will allow me to be better at programming, since I'm a total novice. Greetings.

So yeah, that's my code. When I run it on cpp.sh with a sample test string (std::string strng = "abcd\nEFGH\nijkl\nMNOP";) and replace k and n with constant numbers (just because these parameters aren't passed to any function), I get exactly the expected output.

class ScalingSqStrings
{
public:
    static std::string scale(const std::string &strng, int k, int n)
    {if(strng == "") return "";
    std::string temp="";

   for(int i=0; i<strng.length(); i++)
      {
        
        for(int j=0; j<k; j++)
            
        {
        
        if(strng[i] == '\0' || strng[i] == '\n' ){
            
            for(int l=0; l<n; l++)
            {
               std::cout << temp << "\n"; 
            }
            temp="";
            break;
            
        }
        temp+=strng[i];
        }
        
        //if(strng[i] == '\n') std::cout << '\n';
        
       }
        for(int l=0; l<n; l++)
            {
               std::cout << temp << "\n"; 
            }
      }
};

My code displays the correct output in other compilers (for example c++ shell), but somehow I'm not able to get it working here. How can I solve it?