Explanation:
import java.util.Scanner;
public class Student {
public static void main(String[ ] args){
//Enter 5 test scores
int[ ] marks=enterMark( );
//calculate average
double averageScore=calAverage(marks);
//calculate grade
char theGrade=letterGrade(marks);
//Display average
System.out.println("Average: "+ average Score);
//Display grade
System.out.println(" Grade: "+ theGrade);
/** method collects 5 test scores and returns reference*/
public static int[ ] enterMark( ){
int[ ] arr=new int[5];
//create Scanner object
Scanner keyboard=new Scanner(System. in);
int index=0;
while ( index<arr.length ){
System. out.print("Enter test "+ (index+1) );
arr[index]=keyboard. nextInt( );
index++;
}
return arr;
}
/**method calculates and returns average*/
public static double calAverage(int[ ] arr){
double total=0.0; //to hold total
double average=0.0;//hold average
for (int count=0; count<arr.length; count++){
total+=arr[count];
}
average=total/arr.length;
return average;
}
/** method calculates and returns grade*/
public static char letterGrade(double ave){
char grade; //to hold grade
if (ave >30)
grade='D';
if (ave >50)
grade='C';
if (ave > 60)
grade='B';
if (ave > 70)
grade='A';
else
grade='F';
return grade;
}
}
