vector problems

 
//ask the user for test grades. 
//The user should enter -99 to indicate no more test grades. 
//Then the program should sort the grades in ascending order 
//and display the grades in that order. 
//Also, the program will calculate and display the average test score.
//then the lowest score will be dropped
  
 
#include <iostream>
#include <vector>	  //include the vector header
#include <algorithm>   //Required for STL algorithms
#include <cstring>  // strcmp
#include <cstdlib>  // atoi
using namespace std;
int main()
{
 vector<int> testScores;
 const int size = 4;
 char input[size];
 int total = 0, count = 0;
 int tempscores;
 vector<int> vect;
 float average;

 
 
 //Ask for the number of tests
 cout << "Enter a test score, then enter Q when you are finished."; 
 cin.getline(input, size);
 while (tolower(input[0]) != 'q') // I want this to be -99not 'q' but can't figure out code
 {
  total += atoi(input); // Keep a running total
  count++;	// Count the numbers entered
  cout << "Enter the next number or Q to quit: ";
  cin.getline(input, size);
 }
 for (tempscores = 0; tempscores < vect.size(); tempscores++)
 {
  int tempScores; // to hold the number of testscores entered
 testScores.push_back(tempScores); // add elemnet to testscores
 }
 //Sort
if (count !=0)
{
 sort(vect.begin(), vect.end());
 //Display the vector's element again
 cout << "The elements have been sorted: \n";
 for (tempscores = 0; tempscores < vect.size(); tempscores++)
  cout << vect[tempscores] << " ";
 cout << endl;
 
}
//calculate the avg.
//if (count !=0)
//{
// average = static_cast<float>(total) / count;
// cout << "Average: " << average << endl;
//}

average = avgVector(testScores);
cout << "Average: " << average << endl;
return 0;

float avgVector(vector<int> vect)
{
 
 int total = 0;
 float avg;
 if (vect.empty()) //determine if the vector is empty
 {
  cout << "No values to average. \n";
  avg = 0.0;
 }
 else
 
 {
  for (int count = 0; count < vect.size(); count++)
   total +=[count]
   avg = total / vect.size();
 }
}
 return avg;
}