grado tabla matriz

#include <iostream>

using namespace std;

const int NO_OF_STUDENTS = 10;
int getstudentcount ();
int getexamscores ();
int getlabscores();
int calculatepointgrades ();
int calculatelettergrades ();
int showgradedata ();
int arrayavg ();
double arrayave ();
int students[NO_OF_STUDENTS];
int examscores[NO_OF_STUDENTS];
int labscores[NO_OF_STUDENTS];
int s;
int Exam;
int lab;
int main()
{
    int getstudentcount ();
    cout << "Enter the number of students"<< endl;
    for (int s = 0; s <= 10; s++)

    {
        
        int students (0);
        cout << "students[NO_OF_STUDENTS]";
    }
    
    int getexamscores ();
    cout << "Enter the student exam scores"<< endl;
    return 0;
    for(int Exam = 0; Exam <= 10; Exam++)
    {
        int examscores (0);
        cout << "examscores[NO_OF_STUDENTS]";
    }
    
    int getlabscores();
    cout << "Enter the students lab scores" <<endl;
}