/*
* querySet()
*
* Read in and parse through the given file. The 'Query' file contains a list of
* student ID numbers. Each entry in the Query file is a student ID given on a
* line by itself. You are to compute and report the GPA for each of the students
* listed in the Query file. The following is an example Query file:
*
* 5291738860
* 9251733870
*
* For each student ID given in the Query file, use the student information stored in
* your set to compute the GPA for the student and create an output string which
* contains the student ID, GPA, and name. If the given student ID does not match any
* student, do not give any output for that student ID. Each line of the output string
* contains student ID, GPA, and name as shown:
*
* 5291738860 2.85 Dick B. Smith
* 9251733870 3.00 Harry C. Anderson
*
* Return a string representation of the given query. If an invalid file name is given,
* then return an empty string. The precision of the GPA will be rounded to two decimal places.
* There will be a trailing new line.
*/
string GPA::querySet(string fileName)
{
ifstream file;
file.open(fileName);
if (file.fail() || file.bad())
{
return "";
}
unsigned long long int ID = 0;
stringstream ss;
StudentInterface* student = NULL;
typedef set<StudentInterface*, Comparator>::iterator it;
while (file >> ID)
{
it itr;
for (itr = mySet.begin(); itr != mySet.end(); itr++)
{
if ((*itr)->getID() == ID)
{
student = *itr;
ss << ID << " " << student->getGPA() << " " << student->getName() << "\n";
}
}
}
file.close();
return ss.str();
}
string GPA::queryMap(string fileName)
{
if(!checkQueryFile(fileName))
{
string empty = "";
return empty;
}
stringstream sout;
ifstream queryfile;
queryfile.open(fileName.c_str());
string idin;
cout << fileName << endl;
while(getline(queryfile, idin))
{
//cout << "made it here " << idin << endl;
stringstream ss;
unsigned long long int id;
ss << idin;
ss >> id;
if (mapFindStudent(id) != NULL)
{
StudentInterface* student = new Student();
delete student;
student = mapFindStudent(id);
sout << student->getID() << " " << student->getGPA() << " " << student->getName() << "\n";
}
}
queryfile.close();
return sout.str();
}