project combing arrays, pointers and structures

[blackqueen212]

Hi, this is the exercise:
Write a program that uses a record structure to store
a Student Name, Student ID, Test Scores, Average Test
Score, and Grade. The program should keep a list of
test scores for a group of 6 students. The program
should ask for the name, ID, and four test scores for
each student. Then the average test score should be
calculated and stored. The course grade should be
based on the following scale:

Average Test Score Course Grade
------------------ ------------
90 - 100 A
80 - 89 B
70 - 79 C
60 - 69 D
59 or below F

A table should be displayed on the screen listing each
student's name, ID, average test score, and course grade.
Implement with functions.

My code runs but it isnt returning anything(readable/correct) and i have no clue why

this is what i have so far:

#include <iostream>
using namespace std;

const int columns = 4;

struct StuRec //user defined datatype
{
	int id[6];
	char names[6][20];
	int scores[6][4];
	double avg[6];
	char grade[6];
}; //semi-colon required 

//pass by reference
void avg(StuRec&);
char grade(StuRec&);

int main()
{
	const int rows = 6;
	
	//declare and allocate
	StuRec r;
	
	//enter student id
		for(int i=0; i<6 ;i++)
		{
			cout<<"Enter Student id "<<i+1<<": ";
			cin>>r.id[i];
		}
	cout<<endl;
	
	
	//enter student+scores
	for(int i=0; i<6 ;i++)
	{
		cout<<"Enter Name of student "<<i+1<<": ";
		cin>>r.names[i];
		cout<<endl;
	}
	for(int i=0; i<rows; i++)
	{
		cout<<"Enter "<<columns<<" scores for student "<<i+1<<": ";
		for (int j=0; j<columns; j++)
		{
			cin>>r.scores[i][j];
		}
		cout<<endl;
	} 
	
	//display
	cout<<"Student id: "<<r.id<<endl;
	cout<<"Scores: ";
	for(int i=0; i<4 ; i++)
		cout<<r.scores<<" ";
	cout<<endl;
	
	//compAvg
	
	avg(r);
	
	cout<<"Avg Score: "<<r.avg<<endl;
	
	grade(r);
	
	cout<<"Letter Grade: "<<r.grade<<endl;
	
}//endmain


void avg(StuRec& r)
{
	double a;
	double sum=0;
	for(int i=0; i<6; i++)//loop thru students
		{
			a=sum/4;
			r.avg[i]=a;
			cout<<endl;
		}
}//end avg 

char grade(StuRec& r)
{
	int sum = 0;
	char grade;
	for(int j=0; j<6; j++)
	{
		sum += r.scores[columns][j];
	}
	double avg = sum/4;
	cout<<"Avg: "<<avg;
	
	if(avg >= 90)
		grade = 'A';
	if(avg >= 80 && avg < 90)
		grade = 'B';
	if(avg >= 70 && avg < 80)
		grade = 'C';
	if(avg >= 60 && avg < 70)
		grade = 'D';
	if(avg < 60)
		grade = 'F';
	
	return grade;

}

it compiles completely but at the end instead of showing the student name ID average score and class grade it shows....
http://tinypic.com/r/20p643s/8

[blackqueen212]

ok so i figured out that the program is printing out the address of the array instead of the content how would i fix it so it would print out the content

[Khajit]

So when you cout do you do something like
cout<<avg
or cout<<avg[i]?

if you just cout<<avg it should just give you the address of the avg
while cout<<avg[i] tells the compilier that you wish to access the content of a particular index inside the array avg.