Question

PART A

Write a program that converts a total number of seconds to hours, minutes, and seconds.
It should do the following:

1. Prompt the user for input
2. Read an integer from the keyboard
3. Calculate the result
4. Use printf to display the output

Your output must be of the format:
totalSeconds seconds = numHours hours, numMinutes minutes, and numSeconds seconds

For example:
If the user entered: 5000
Your program would output:
5000 seconds = 1 hours, 23 minutes, and 20 seconds
5000 seconds = 01h:23m:20s

Sample run would look like:
Enter the number of seconds: 5000
5000 seconds = 1 hours, 23 minutes, and 20 seconds
5000 seconds = 01h:23m:20s

Sample run would look like:
Enter the number of seconds: 3754
3754 seconds = 1 hours, 2 minutes, and 34 seconds
3754 seconds = 01h:02m:34s

Hint1:Use integer division

Hint2: Use the modulus operator

Please make sure to end each line of output with a newline.
Please note that your class should be named SecondsConverter.

PART B

Write a program that converts change into formatted dollars and cents It should do the following:

1. Prompt the user for their change in Quarters, Dimes, Nickels, Pennies
2. Read the integers from the keyboard
3. Calculate the result
4. Use printf to display the output as $d.cc

Your output must be of the format: (plural is ok even when grammatically incorrect)

You entered:
   6 quarters 
   5 dimes 
   4 nickels 
   3 pennies
The total in dollars is $2.23

Sample run would look like:

Enter the number of quarters:  6
Enter the number of dimes:     5
Enter the number of nickels:   4
Enter the number of pennies:   3
You entered:
   6 quarters 
   5 dimes 
   4 nickels 
   3 pennies
The total in dollars is $2.23

Sample run would look like:

Enter the number of quarters:  1
Enter the number of dimes:     2
Enter the number of nickels:   3
Enter the number of pennies:   2
You entered:
   1 quarters 
   2 dimes 
   3 nickels 
   2 pennies
The total in dollars is $0.62

Hint1: Use printf and be sure to have at least 1 digit to the left of the decimal, and a max of 2 floating on the right.

Please make sure to end each line of output with a newline.
Please note that your class should be named ChangeConverter.

PART C

Write a program that converts a temperature from Celsius to Fahrenheit.
It should do the following:

1. Prompt the user for input
2. Read a double value from the keyboard
3. Calculate the result. Here is the formula.  F = ( C * 9 / 5 ) + 32
4. Format the output to one decimal place.

Your prompt to the user to enter the temperature in Celsius must be: Enter the Celsius Temperature as a decimal:

Your output must be of the format: celsiusTemperature C =  fahrenheitTemperature F

For example: If the user entered: 24.0
Your program would output: 24.0 C = 75.2 F

Sample run would look like:
Enter the temperature in degrees celsius:  24
24.0 C = 75.2 F

Sample run would look like:
Enter the temperature in degrees celsius:  7.5
7.5 C = 45.5 F

Hint1: Be careful not to use integer division!
Here is the formula  F = ( C * 9 / 5 ) + 32

Hint2: Remember to use printf to format the output.
Please make sure to end each line of output with a newline.
Please note that your class should be named CelsiusToFahrenheit.

Answer 1

//Java programs

import java.util.Scanner;

public class SecondsConverter {
   public static void main(String args[]) {
       int seconds,temp;
       int h,m,s;
       Scanner input = new Scanner (System.in);
      
       System.out.print("Enter the number of seconds: ");
       seconds = input.nextInt();
       temp = seconds;
      
       s = seconds%60;
       seconds/=60;
      
       m = seconds%60;
       h = seconds/60;
      
       System.out.printf("%d seconds = %d hours, %d minutes, and %d seconds",temp,h,m,s);
       System.out.printf("\n%d seconds = %02dh:%02dm:%02ds\n",temp,h,m,s);
      
       input.close();
   }
}
//sample output

(2)

import java.util.Scanner;

public class ChangeConverter {
   public static void main(String args[]) {
       Scanner input = new Scanner(System.in);
       int quarters,dimes,nickels,pennies;
      
       System.out.print("Enter the number of quarters: ");
       quarters = input.nextInt();
      
       System.out.print("Enter the number of dimes: ");
       dimes = input.nextInt();
      
       System.out.print("Enter the number of nickels: ");
       nickels = input.nextInt();
      
       System.out.print("Enter the number of pennies: ");
       pennies = input.nextInt();
      
       System.out.printf("You entered:\r\n" +
               " %d quarters \r\n" +
               " %d dimes \r\n" +
               " %d nickels \r\n" +
               " %d pennies\n", quarters,dimes,nickels,pennies);
      
       float total = 25*quarters + 10*dimes + nickels*5 + pennies;
      
       System.out.printf("The total in dollars is $%.2f\n", total/100);
       input.close();
   }
}
//sample output

(3)

import java.util.Scanner;

public class CelsiusToFahrenheit {
   public static void main(String args[]) {
       Scanner input = new Scanner(System.in);
       float celcius;
      
       System.out.print("Enter the temperature in degrees celsius: ");
       celcius = input.nextFloat();
      
       float F = ( celcius * 9 / 5 ) + 32 ;
      
       System.out.printf("%.1f C = %.1f F\n", celcius,F);
      
       input.close();
  
   }
}
//sample output