I want to read the file line by line as array with Dev C++

[newnoodle]

Hello everybody,
I am beginner and I just come to C++
I want to read the file, line by line, and line as array, like this:
my file:

6
1 2 4 5 2 1

And I want to get: n=6 and my array, A[] = {1,2,4,5,2,1}
First line to N variable and second line to A array.
I did this, but it didn't make sense
Please help, thank you!

           ifstream F;
           string line;
           F.open("SN.INP");
      
           
           
           if (F.is_open())
           {
              while(getline(F,line))
              {
                  cout<<line<<'\n';                                        
              }             
              F.close();                
           }
           else
                  cout<<"file couldn't be opened";  

[Norm Gunderson]

If you want to parse the contents of a string, you could use a stringstream object:

      // Get the line containing the number of elements & put it into a string
      getline(F,line);
      // Put the contents of the string into a stringsteam object for parsing
      std::stringstream ssLine;
      ssLine.str(line);
      // Grab a single int from the stringstream - no error-checking here!!!
      int numElems;
      ssLine >> numElems;
      // Initialise an array for storing numElems ints
      int * elements = new int[numElems];

You need to #include <sstream> and then do something similar for the next line, where you want to extract the requisite number of ints from the stringstream object & populate your array with them.