quiz3.java

import java.util.Scanner; //importing scanner
public class itec133_quiz3 { //program begins
    public static void main(String[] args) { //main method begins

        Scanner input = new Scanner (System.in); //scanner declaration

        double [] num = new double [8]; //double array declaration

        for(int i=0; i<num.length; i++) { //for loop being used to populate the array num
            System.out.println("Enter a decimal number: ");
            num[i] = input.nextDouble();
        } //for loop ends

        //output statement showing the smallest value of the array
        System.out.println("The smallest number of the array is: " +getSmallest(num));

        double marks; //variable declaration

        //input statement for the user to enter the student's mark
        System.out.println("Please enter a mark from 0 - 100: ");
        marks = input.nextDouble();

        System.out.println(+getGrade(marks));
    } //main method ends

    //method called getSmallest, takes on the argument which is an array. this method sorts the array in ascending order and returns the smallest value ONLY of the array.
    public static double getSmallest(double [] array) {
        double smallest = 0; //variable declaration

        //for loop 'j' used to go through the array.length elements
        for(int j=0; j<array.length; j++) {
            //for loop 'k' used to sort the array in ascending order
            for(int k=j+1; k<array.length; k++) {
                //if statement to sort the array
                if (array[j] < array[k]) {
                    smallest = array[j]; //stores the first element in smallest
                    array[j] = array[k]; //replaces array[j] with array[k]
                    array[k] = smallest; //puts smallest in array[k]
                } //if statement ends
            } //for loop 'k' ends
        } //for loop 'j' ends
        return smallest; //returns the smallest value when method is called
    } //method getSmallest ends

    //method called getGrade, takes on the double argument mark. this method goes through a series of if statements to assign and return a letter grade to the mark value.
    public static double getGrade(double mark) {
        //if statements to determine the letter grade the mark value should be assigned to
        if(mark >= 90 && mark <= 100) {
            System.out.println("A");
        }
        else
        if(mark >= 85 && mark <= 89) {
            System.out.println("B+");
        }
        else
        if(mark >= 80 && mark <= 85) {
            System.out.println("B");
        }
        else
        if(mark >= 75 && mark <= 80) {
            System.out.println("C+");
        }
        else
        if(mark >= 70 && mark <= 75) {
            System.out.println("C");
        }
        else
        if(mark >= 65 && mark <= 70) {
            System.out.println("D+");
        }
        else
        if(mark >= 60 && mark <= 65) {
            System.out.println("D");
        }
        else
        if(mark < 60) {
            System.out.println("F");
        }

        return mark; //returns the letter grade when method is called
    } //method getGrade ends
} //program ends