Question

Please write a Java program that does the following:

1. Create an array of 100 integers.
2. Store 100 random integers (between 1 and 100) in the array.
3. Print out the elements of the array.
4. Sort the array in ascending order.
5. Print out the sorted array.
6. Prompt the user to enter a number between 1 and 100. Search the array for that number and then display "Found" or "Not Found" message.
7. Display each number from 1 to 100 and the number of times each is found in the array.
8. Display the average of the numbers in the array.
9. Display the highest number in the array.
10. Display the lowest number in the array.

Other requirements.

1. Everything should be done using METHODS.
2. NO NEED FOR A MENU SYSTEM. Just call the methods in the sequence above.

Answer 1

Answer:

Explanation:

createArray() function creates a random object and assign 100 random numbers to a new array a and return the array.

displayArray() function traverses the array using for loop and prints every element one by one.

sortArray() function sorts the array using bubble sort method.

searchinArray() function asks the user for a number to be searched, takes the input using Scanner class object and then searches the array for the element and print 'Found' if element is present, otherwise 'Not Found'.

count() function print the count of each element from 1 to 100, how many times each number is in the array.

average() function finds the average of the total numbers in array.

highest() function finds the highest element in the array.

lowest() function finds the lowest value element in the array.

*******************************************************************************
import java.util.Random;
import java.util.Scanner;

public class Main
{
public static int[] createArray()
{
Random r = new Random();
int a[] = new int[100];
  
for(int i=0; i<100; i++)
{
a[i] = r.nextInt(100)+1;
}
  
return a;
}
  
public static void displayArray(int a[])
{
for(int i=0; i<100; i++)
{
System.out.print(a[i]+" ");
}
  
System.out.println();

}
  
public static void sortArray(int a[])
{
for (int i=0; i<99; i++)
{

for (int j=0; j<100-i-1; j++)
{
if (a[j]>a[j+1])
{
int temp = a[j];
a[j] = a[j+1];
a[j+1] = temp;
}
}
}
}
  
public static void searchinArray(int[] a)
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter the number to be searched: ");
int n = sc.nextInt();
int f=0;
for(int i=0; i<100; i++)
{
if(a[i]==n)
{
System.out.println("Found");
f=1;
break;
}
}
  
if(f==0)
{
System.out.println("Not found");
}

}
  
public static void count(int[] a)
{
for(int i=1; i<=100; i++)
{
System.out.print(i+": ");
int count = 0;
for(int j=0; j<a.length; j++)
{
if(a[j]==i)
count++;
}
  
System.out.print(count);
System.out.println();
  
}
}
  
public static void average(int a[])
{
double avg = 0.0;
for(int i=0; i<100; i++)
{
avg = avg+a[i];
}
  
avg = (float)avg/100;
  
System.out.println("Average: "+avg);
}
  
public static void highest(int a[])
{
int highest = a[0];
for(int i=1; i<100; i++)
{
if(a[i]>highest)
{
highest = a[i];
}
}
  
System.out.println("Highest number: "+highest);
}
  
public static void lowest(int a[])
{
int lowest = a[0];
for(int i=1; i<100; i++)
{
if(a[i]<lowest)
{
lowest = a[i];
}
}
  
System.out.println("Lowest number: "+lowest);
}
  
  
  
   public static void main(String[] args) {
      
       int a[] = createArray();
      
       displayArray(a);
      
       sortArray(a);
      
       displayArray(a);
      
       searchinArray(a);
      
       average(a);

count(a);
      
       highest(a);
      
       lowest(a);
   }
}

Output:

83 71 65 24 31 36 14 37 84 57 20 71 63 72 71 74 7 95 18 32 24 100 95 13 11 72 79 56 48 21 29 76 5 57 17 32 12 67 13 8 56 10 60 17 73 77 43 35 94 35 14 49 57 46 15 15 90 60 97 60 68 65 68 92 13 80 65 36 29 58 67 42 47 40 26 100 80 38 23 24 93 37 15 54 71 82 56 45 38 73 31 77 67 100 13 98 20 78 18 38
5 7 8 10 11 12 13 13 13 13 14 14 15 15 15 17 17 18 18 20 20 21 23 24 24 24 26 29 29 31 31 32 32 35 35 36 36 37 37 38 38 38 40 42 43 45 46 47 48 49 54 56 56 56 57 57 57 58 60 60 60 63 65 65 65 67 67 67 68 68 71 71 71 71 72 72 73 73 74 76 77 77 78 79 80 80 82 83 84 90 92 93 94 95 95 97 98 100 100 100
Enter the number to be searched:
5
Found
Average: 50.279998779296875
1: 0
2: 0
3: 0
4: 0
5: 1
6: 0
7: 1
8: 1
9: 0
10: 1
11: 1
12: 1
13: 4
14: 2
15: 3
16: 0
17: 2
18: 2
19: 0
20: 2
21: 1
22: 0
23: 1
24: 3
25: 0
26: 1
27: 0
28: 0
29: 2
30: 0
31: 2
32: 2
33: 0
34: 0
35: 2
36: 2
37: 2
38: 3
39: 0
40: 1
41: 0
42: 1
43: 1
44: 0
45: 1
46: 1
47: 1
48: 1
49: 1
50: 0
51: 0
52: 0
53: 0
54: 1
55: 0
56: 3
57: 3
58: 1
59: 0
60: 3
61: 0
62: 0
63: 1
64: 0
65: 3
66: 0
67: 3
68: 2
69: 0
70: 0
71: 4
72: 2
73: 2
74: 1
75: 0
76: 1
77: 2
78: 1
79: 1
80: 2
81: 0
82: 1
83: 1
84: 1
85: 0
86: 0
87: 0
88: 0
89: 0
90: 1
91: 0
92: 1
93: 1
94: 1
95: 2
96: 0
97: 1
98: 1
99: 0
100: 3
Highest number: 100
Lowest number: 5

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