Basic programming help ? logic is enough

1) Write a program MathSkills that asks the user to enter 3 numbers. Perform simple computations and output the results as shown below. (Pay attention to spaces, lines, and upper? and lower?case.)

Enter THREE numbers and I will show you my math skills: 5 3 7

Check this out:

5 + 3 - 7 = 1

5 * 3 - 7 = 8

5 * (3 - 7) = -20

5 squared is 25

2) Write a program DayConverter which asks the user to enter a number of days and outputs the equivalent duration in hours, in minutes, and in seconds.

For example:

Enter a number of days:

2 days is 48 hours or 2880 minutes or 172800 seconds

3) Write a program HourConverter which asks the user to enter a number of hours and outputs the equivalent duration in weeks+days+hours. (Hint: Use the division and mod operator.)

Here are three examples:

Enter a number of hours:

7 hours is 0 weeks, 0 days, and 7 hours

Enter a number of hours:

60 hours is 0 weeks, 2 days, and 12 hours

Enter a number of hours:

500

500 hours is 2 weeks, 6 days, and 20 hours

Regards

Here we go:

// 1. MathSkills.java

import java.util.Scanner;

public class MathSkills

{

public static void main(String[] args)

{

Scanner keyboard = new Scanner(System.in);

System.out.print("Enter THREE numbers and I will show you my math skills: ");

int num1 = keyboard.nextInt();

int num2 = keyboard.nextInt();

int num3 = keyboard.nextInt();

System.out.println("\nCheck this out:");

int result = num1 + num2 - num3;

System.out.println(num1 + " + " + num2 + " - " + num3 + " = " + result);

result = num1 * num2 - num3;

System.out.println("\n" + num1 + " * " + num2 + " - " + num3 + " = " + result);

result = num1 * (num2 - num3);

System.out.println("\n" + num1 + " * (" + num2 + " - " + num3 + ") = " + result);

result = num1 * num1;

System.out.println("\n" + num1+ " squared is " + result);

}

// 2. DayConverter.java

import java.util.Scanner;

public class DayConverter

{

public static void main(String[] args)

{

Scanner keyboard = new Scanner(System.in);

System.out.println("Enter a number of days:\n");

int days = keyboard.nextInt();

int hours = days * 24;

int mins = hours * 60;

int secs = mins * 60;

System.out.println("\n" + days + " days is " + hours + " hours or " + mins + " minutes or " + secs + " seconds");

}

// 3. HourConverter.java

import java.util.Scanner;

public class HourConverter

{

public static void main(String[] args)

{

Scanner keyboard = new Scanner(System.in);

System.out.println("Enter a number of hours:\n");

int hours = keyboard.nextInt();

int weeks = hours / 168;

int rem = hours % 168;

int days = rem / 24;

int hours2 = rem % 24;

System.out.println("\n" + hours + " hours is " + weeks + " weeks, " + days + " days, and " + hours2 + " hours");

}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Accepted answer
Here we go:

// 1. MathSkills.java

import java.util.Scanner;

public class MathSkills
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter THREE numbers and I will show you my math skills: ");
int num1 = keyboard.nextInt();
int num2 = keyboard.nextInt();
int num3 = keyboard.nextInt();
System.out.println("\nCheck this out:");
int result = num1 + num2 - num3;
System.out.println(num1 + " + " + num2 + " - " + num3 + " = " + result);
result = num1 * num2 - num3;
System.out.println("\n" + num1 + " * " + num2 + " - " + num3 + " = " + result);
result = num1 * (num2 - num3);
System.out.println("\n" + num1 + " * (" + num2 + " - " + num3 + ") = " + result);
result = num1 * num1;
System.out.println("\n" + num1+ " squared is " + result);
}
}

// 2. DayConverter.java

import java.util.Scanner;

public class DayConverter
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter a number of days:\n");
int days = keyboard.nextInt();
int hours = days * 24;
int mins = hours * 60;
int secs = mins * 60;
System.out.println("\n" + days + " days is " + hours + " hours or " + mins + " minutes or " + secs + " seconds");
}
}

// 3. HourConverter.java

import java.util.Scanner;

public class HourConverter
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter a number of hours:\n");
int hours = keyboard.nextInt();
int weeks = hours / 168;
int rem = hours % 168;
int days = rem / 24;
int hours2 = rem % 24;
System.out.println("\n" + hours + " hours is " + weeks + " weeks, " + days + " days, and " + hours2 + " hours");
}
}