Read from a file C++

Question

Hi I want to read data from a VTK file into my C++ program. Here is how my files will typically look.

POINTS 2 double

1 2

Answer 1

You could try some code that looks like this. It's kind of a combo of C and C++:

int main ()
{
  //assuming that you've completely read in the file to a char* called myFileContents
  char * token;
  token = strtok (myFileContents," ");
  while (token != NULL)
  {
    istringstream iss( token );
    int readInData;
    readInData << iss;
    if(!iss){
      //this means that the data wasn't numeric so don't do anything with it
    }
    else{
      //data was numeric, store it how ever you want
    }
    token = strtok (NULL, " ");
  }
  return 0;
}