Question

JAVA

Program 2: In Order

Using an IF/ELSE IF/ELSE structure, write a program that will prompt the user for three numbers and displays them in ascending order.

• First, the program will prompt the user for each of the three numbers.
• Next, find the smallest value of the three.
• Then decide which of the other two is the next smallest.
• Then have the program display the three numbers in ascending order.

Be sure to do the following:

1. Determine what the input will be, it's data type, and assign a variable for each value.
2. Determine what the output will be. Do you need new variables for the output or can you use the input again? There is no right or wrong answer here. It’s also possible you may have to develop your algorithms before you can decide whether you will use new variables for your output or just use the input variables. You can always change your mind if you find you need to.
3. Do you need any formulas?
4. Create an initial algorithm of the basic steps.
5. Develop the refined algorithm from the initial algorithm.

Be sure to include with your program as documentation:

1. The Program Prologue
2. The Input data
3. The Output data
4. Any Formulas you may have.
5. The Initial Algorithm
6. The Refined Algorithm

NOTE 1:

• DO NOT use the "return 0" code, end, break, or exit to force an exit from within your IF/ELSE structure.  Declare all variables within the data declaration section.
  • Let the program progress to the end of the main function.
  • The end of the main function is the only place that the “return 0” should be placed.
  • A SWITCH statement is the only place that the break command should be used.
• DO NOT use the "continue" statement.

NOTE 2:
1. Declare all variables within the data declaration section of each class and method.  (-5)
2   Do not get input on the same line as a variable declaration.  (-5)
3. Do not place an equation for computation on the same line as declaring a variable.  (-5)
4. Do not place an equation for computation on the same line an input statement.  (-5)
5. Do not place any computations within an output statement. (-5)

Test your program with the following sets of data:

1. First number: 3
   Second number: 2
   Third number: 1
2. First number: 3
   Second number: 1
   Third number: 2
3. First number: 1
   Second number: 2
   Third number: 3
   
4. First number: 1
   Second number: 3
   Third number: 2
   
5. First number: 2
   Second number: 1
   Third number: 3
6. First number: 2
   Second number: 3
   Third number: 1

Answer 1

Algorithms:

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Step1: Input Data into three Variables

Step2: Find Smallest of three number and put it in number1

Step3: Find Next Smallest Number and put it in number2

Step4: Display Data

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Code Is Given Below:

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import java.util.Scanner;

//class that will arrange three number in ascending order
public class MinToMax {
   public static void main(String[] args) {
       Scanner scn=new Scanner(System.in);//creating scanner object to get user input
       //declare variable of int type
       int number1;
       int number2;
       int number3;
       int min;
       //taking input from user
       System.out.print("First number: ");
       number1=scn.nextInt();
       System.out.print("Second number: ");
       number2=scn.nextInt();
       System.out.print("Third number: ");
       number3=scn.nextInt();
       //finding smallest of three numbers and placed it in number 1 variable
       if (number1 <= number2 && number1 <= number3) {
           min=number1;
          
       }
   else if (number2 <= number1 && number2 <= number3) {
   min=number2;
           number2=number1;
           number1=min;
   }
  
   else {
   min=number3;
   number3=number1;
   number1=min;
   }
       //find next smallest number and place it in number2 variable
       if(number2<number3) {
       }
       else if(number3<number2) {
           min=number3;
           number3=number2;
           number2=min;
       }
       //printing result
       System.out.println("Asecnding order is : "+number1+","+number2+","+number3);
   }

}

Output:

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Code Snapshot:

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