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"failing student" FIRST TRY

  • vector<Student_info> extract_fails(
  • vector<Student_info>& students)
  • {
  • vector<Student_info> pass, fail;
  • for(vector<Student_info>::size_type i = 0;
  • i != students.size(); ++i)
  • if ( fgrade(students[i]))
  • fail.push_back(students[i]);
  • else
  • pass.push_back(students[i]);
  • students = pass;
  • return fail;
  • }