lab 10


1.
import java.util.Scanner;

public class Test1{

     public static void main(String []args){
     
        Scanner input = new Scanner(System.in);
        double[] student1Scores = new double[4];
     
System.out.println("How many students do you want to record?");
int noOfStudents = input.nextInt();

String[] names = createNames(noOfStudents);

System.out.println("Please enter their scores:");
         for(int i=0;i<names.length;i++)
{
System.out.println("Enter score for " + names[i]);
            for(int j=0;j<student1Scores.length;j++)
            {
                student1Scores[j] = input.nextDouble();
            }
            double average = averageScore(student1Scores);
System.out.println(names[i] + " average score is " + average);
char grade = determineGrade(average);
System.out.println(names[i] + " grade is then " + grade);
        }
System.out.println("Displaying all names!");
displayNames(names);
        }

public static String[] createNames(int noOfStudents)
{
String[] n = new String[noOfStudents];

Scanner input = new Scanner(System.in);
System.out.println("Please enter " + noOfStudents  + " student's names");
        for(int i=0;i<n.length;i++)
        {
            n[i] = input.nextLine();
        }
System.out.println("You have entered all names!TQ");
return n;
}

public static void displayNames(String[] names)
{
for(int i=0;i<names.length;i++)
{
System.out.println(names[i]);
}
}
 
     public static char determineGrade(double average)
{
if(average > 90)
return 'A';
else if(average > 80)
return 'B';
else return 'C';
}

     public static double averageScore(double[] x)
     {
     
         double sum = 0;
         for(int i=0; i<x.length;i++)
         {
             sum = sum + x[i];
         }
         double average = sum/x.length;
         return average;
     }


}

2.
import java.util.Scanner;
public class Test2{
public static void main (String[] args){
Scanner input=new Scanner(System.in);
System.out.println("Enter number of rows and column of array:");
int rows = input.nextInt();
int columns=input.nextInt();
double [][]table=new double[rows][columns];
System.out.println("Enter array:");
for(int i=0;i<table.length;i++)
{
for(int j=0;j<table[i].length;j++)
{
table[i][j]=input.nextDouble();
}
}
int[] location=locateLargest(table);
System.out.printf("The location of the largest element is (%d,%d)%n",location[0],location[1]);
}

public static int []  locateLargest(double[][]a)
{
int [] location=new int [] {0,0};
double largest=a[0][0];
for (int i=0;i<a.length;i++)
{
for(int j=0;j<a[i].length;j++)
{
if(largest<a[i][j])
{
largest=a[i][j];
location[0]=i;
location[1]=j;
}
}

}
return location;
}
}

3.
import java.util.Scanner;
public class Test3{

     public static void main(String []args){
         final int Total_numbers=6;
         int[] numbers = new int[Total_numbers];
         Scanner input=new Scanner (System.in);
        System.out.println("Enter" + number.length + "integer numbers: ");
        //Read all numbers
        for (int i=0;i<numbers.length;i++)
        {
            number[i]=input.nextInt();
        }
        //find the largest element
        int max=numbers[0];
        for (int i=1;i<numbers.length;i++)
        {
            if (numbers[i]>max)
            {
                max=numbers[i];
            }
        }
        //find the smallest element
        int min=number[0];
        for (int j=1;j<numbers.length;j++)
        {
            if (numbers[j]<min)
            {
                min=numbers[j];
            }
        }
        //find the occurence of the largest number
        int count1=0;
        for(inti=0; i<numbers.length;i++)
        {
            if(numbers[i]==max)
            count1++;
        }
        //find the occurence of the smallest number
        int count2=0;
        for(int j=0;j<numbers.length;j++)
        {
            if(numbers[j]==min)
            count2++;
        }
        int swap=numbers[0];
        for(int i=0; i<numbers.length/2;i++)
        {
            int temp=numbers[i];
            numbers[i]=numbers[numbers.length-i-1];
            numbers[numbers.length-i-1]=temp;
        }
        //prepare the result
        System.out.println("Output:");
        System.out.println("The array is:");
        for (int i=0; i<numbers.length;i++)
        {
            System.out.println(numbers[i] + "");
         
            System.out.println();
            System.out.println("The largest number is " + max);
            System.out.println("The smallest number is" + min);
            System.out.println("The occurrence count of the largest number is" + count1);
            System.out.println("The occurence count of the smallest number is" + count2);
         
         
        }
    }
     
 }
}



4.
import java.util.Scanner;
public class Test4 {
public static void main(String[] args){
Scanner input=new Scanner(System.in);
final int maxrange=10;
final int minrange =-1;
final int range=10;

int[] list=new int[maxrange];

for(int i=0; i<list.length;i++)
{
list[i]=0;
}
System.out.println("Enter a list of integer between 1 and 100");
System.out.println(" To stop, enter an integer not in this range");
System.out.println("Enter integer");
int value= input.nextInt();
while (value>=minrange && value<=(maxrange*range))
{
list[(value-1)/range]=list[(value-1)/range]+1;
System.out.println("Enter integer");
value=input.nextInt();
}
System.out.println("Here is your histogram");
for (int i=0;i<list.length;i++)
{
System.out.println(" " + (i*range+1) + " " + (i+1)*range+ "\t|");
for (int j=0; j<list[i];j++)
{
System.out.println("*");
}
System.out.println();
}
}
}