HELP NEEDED with functions, CODE included

[Ashdricky]

So I need to compartmentalize this code into different functions which will be called by the main. I have been having issues with calling the dynamic arrays into the functions I write, will someone kindly tell me where I'm wrong here?

PS. My skill is entry level
Thanks-Rob

#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

/*void enterScores(double HW,double LAB,double EXAM)
{

}
	;

	*/
int main()
{
	// Variable HW_count represents the number of recorded homework scores.
	// Variable LAB_count represents the number of recorded lab scores.
	// Variable EXAM_count represents the number of recorded exam scores.
	int HW_count;
	int LAB_count;
	int EXAM_count;
	// Variable HW_per represents the weight of recorded homework scores.
	// Variable LAB_per represents the weight of recorded lab scores.
	// Variable EXAM_per represents the weight of recorded exam scores.
	double HW_per;
	double LAB_per;
	double EXAM_per;
	// Variable HW_scores is an dynamic array containing the actual values of the recorded homework scores.
	// Variable LAB_scores is an dynamic array containing the actual values of the recorded lab scores.
	// Variable EXAM_scores is a dynamic array containing the actual values of the recorded exam scores.
	double *HW_scores;
	double *LAB_scores;
	double *EXAM_scores;

	double HW_avr=0; //used for calculation
	double LAB_avr=0; //used for calculation
	double EXAM_avr=0;//used for calculation

	double HW_sum=0; //used for calculation
	double LAB_sum=0; //used for calculation
	double EXAM_sum=0;//used for calculation

	double HW_final=0; //used for calculation
	double LAB_final=0; //used for calculation
	double EXAM_final=0;//used for calculation

	double FINAL_avr;//Final number grade
	char LETTER_grade;//

	//the following is used to collect data from the end user
	cout <<"Enter the number of homework: \n";
	cin >> HW_count;
	cout <<"Enter the number of labs: \n";
	cin >> LAB_count;
	cout <<"Enter the number of exams: \n";
	cin >> EXAM_count;
		system ("CLS");
	
	cout <<"Enter the percent weight of homework: \n";
	cin >> HW_per;
	cout <<"Enter the percent weight of labs: \n";
	cin >> LAB_per;
	cout <<"Enter the percent weight of exams: \n";
	cin >> EXAM_per;
		system ("CLS");
	
	HW_scores = new double[HW_count];
	
	for (int x = 0; x < HW_count; x++)
	{
	cout << "Enter score for Homework " <<x+1<< "\n";
	cin >> HW_scores[x];
	}
		system ("CLS");	
	LAB_scores = new double[LAB_count];
	
	for (int x = 0; x < LAB_count; x++)
	{
	cout << "Enter score for lab " <<x+1<< "\n";
	cin >> LAB_scores[x];
	}
		system ("CLS");
	EXAM_scores = new double[EXAM_count];
	
	for (int x = 0; x < EXAM_count; x++)
	{
	cout << "Enter score for Exam " <<x+1<< "\n";
	cin >> EXAM_scores[x];
	}

	// this section calculates the average of the homework assignments, labs, and exams
		for (int x = 0; x < HW_count; x++)
	{
	HW_sum=HW_sum+HW_scores[x];
	}
		HW_avr =HW_sum/HW_count;

		for (int x = 0; x < LAB_count; x++)
	{
	LAB_sum=LAB_sum+LAB_scores[x];
	}
		LAB_avr =LAB_sum/LAB_count;

		for (int x = 0; x < EXAM_count; x++)
	{
	EXAM_sum =EXAM_sum+EXAM_scores[x];
	}
		EXAM_avr =EXAM_sum/EXAM_count;

	//this code calculates the weighted averages
			
	HW_final =(HW_avr*HW_per);
	LAB_final =(LAB_avr*LAB_per);
	EXAM_final =(EXAM_avr*EXAM_per);
	FINAL_avr=(HW_final+LAB_final+EXAM_final)/100;

	//this codes determines the letter grade
if (FINAL_avr >= 90)
{
    LETTER_grade = 'A';
}
else if (FINAL_avr >= 80)
{
    LETTER_grade = 'B';
}
else if (FINAL_avr >= 70)
{
    LETTER_grade = 'C';
}
else if (FINAL_avr >= 60)
{
    LETTER_grade = 'D';
}
else
{
    LETTER_grade = 'F';
} 

	
	//this code is the final output code

	system ("CLS");
	setprecision(4);

		cout << "\n Homework scores: \n\n";
	for (int x = 0; x < HW_count; x++)
	{
	cout << "Homework " <<x+1<< ": ";
	cout << HW_scores[x]<< " \n";
	}
	
		cout << "\n Lab scores: \n\n";
	for (int x = 0; x < LAB_count; x++)
	{
	cout << "Lab " <<x+1<< ": ";
	cout << LAB_scores[x]<< " \n";
	}
	
		cout << "\n Exam scores: \n\n";
	for (int x = 0; x < EXAM_count; x++)
	{
	cout << "Exam " <<x+1<< ": ";
	cout << EXAM_scores[x]<< " \n";
	}
	
	cout <<setprecision(4)<<"\n"<<"Homework average:" << HW_avr<< "\n";
	cout <<setprecision(4)<<"Lab average:" << LAB_avr<< "\n";
	cout <<setprecision(4)<<"Exam average:" << EXAM_avr<< "\n";
	cout <<setprecision(4)<<"Weighted average:"<< FINAL_avr<<"\n\n";
	cout <<setprecision(4)<<"Letter Grade:" <<LETTER_grade<<"\n\n\n";

	//this code deletes the dynamic arrays that were created during runtime to clear RAM
	delete HW_scores;
	delete LAB_scores;
	delete EXAM_scores;
	return 0;
}