I cannot figure out how to complete this nested loop with the appropriate output ">>>Average of all quizzes: 19.10" I keep getting 18.50. The input I have is this:

1111 3 20 18 19

7821 2 18 20

9102 4 20 20 20 20

8888 1 16

After the 3,2,4,1 are the quizzes (10 of them). Can somebody help me with my code to get the correct value ">>>Average of all quizzes: 19.10", instead of ">>>Average of all quizzes: 18.50"?? I know I need to divide the total of all quizzes by the number of quizzes, but I'm not sure how to do this correctly. Please help!

Here is the code that I have:

Code:

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
int main()
{
ifstream inFile;
ofstream outFile;
inFile.open("in.data");
outFile.open("out.data");
if(inFile.fail()||outFile.fail())
{
cout << "Check your files" << endl;
return 1;
}
outFile.setf(ios::fixed);
outFile.precision(2);
int studId;
int numOfQuiz;
int examlow = 0;
int quizScore = 0;
int records = 0;
int lowStudId;
int highStudId;
int totNumQuiz;
float totAvg = 0;
float quizAvgHigh = 0;
float quizAvgLow = 20;
float allAvg = 0;
float avg = 0;
float quizTotAllStud = 0;
float quizTotSingStud = 0;
inFile >> studId >> numOfQuiz;
outFile << "*~~< Stud Quiz Report >~~*" << endl << endl;
outFile << setw(20) << left << "Stud Id" << left
<< setw(20) << left << "AVG of Quizzes" << endl;
outFile << setw(20) << left << "-------" << left
<< setw(20) << left << "--------------" << endl;
while(inFile)
{
for(int i = 0; i < numOfQuiz; i++)
{
inFile >> quizScore;
totNumQuiz++;
quizTotAllStud += quizScore;
quizTotSingStud += quizScore;
}
avg = (quizTotAllStud/numOfQuiz);
totAvg = totAvg + avg;
outFile << setw(20) << studId << avg << endl;
quizTotAllStud = 0;
if(avg >= quizAvgHigh)
{
quizAvgHigh = avg;
highStudId = studId;
}
if(avg <= quizAvgLow)
{
quizAvgLow = avg;
lowStudId = studId;
}
records++;
quizTotSingStud = 0;
inFile >> studId >> numOfQuiz;
}
outFile << endl << ">>>Average of all quizzes: " << (totNumQuiz/numOfQuiz) << endl << endl;
outFile << ">>>Student with id " << highStudId << " has highest quiz average of " << quizAvgHigh << "" << endl;
outFile << ">>>Student with id " << lowStudId << " has lowest quiz average of " << quizAvgLow << "" << endl << endl;
outFile << ">>>There were " << records << " students & " << totNumQuiz << " quizzes in file." << endl;
inFile.close();
outFile.close();
return 0;
}