Write a program that takes a date as input and outputs the date's season. The input is a string to represent the month and an in
t to represent the day.
Ex: If the input is April 11, the output is:
spring
In addition, check if the string and int are valid (an actual month and day).
Ex: If the input is invalid, the output is:
invalid
The dates for each season are:
spring: March 20 - June 20
summer: June 21 - September 21
autumn: September 22 - December 20
winter: December 21 - March 19
My code is constantly outputting 'invalid, regardless of the date input.
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String inputMonth;
int inputDay;
inputMonth = scnr.next();
inputDay = scnr.nextInt();
if((inputMonth=="March"&&inputDay>19)||inputMonth=="April"||inputMonth=="May"||(inputMonth=="June"&&inputDay<21))
{
System.out.println("spring");
}
else if((inputMonth=="June"&&inputDay>20)||inputMonth=="July"||inputMonth=="August"||(inputMonth=="September"&&inputDay<22))
{
System.out.println("summer");
}
else if((inputMonth=="September"&&inputDay>21)||inputMonth=="October"||inputMonth=="November"||(inputMonth=="December"&&inputDay<21))
{
System.out.println("autumn");
}
else if((inputMonth=="December"&&inputDay>20)||inputMonth=="January"||inputMonth=="February"||(inputMonth=="March"&&inputDay<20))
{
System.out.println("winter");
}
else
{
System.out.println("invalid");
} }
}
Ex: If the input is April 11, the output is:
spring
In addition, check if the string and int are valid (an actual month and day).
Ex: If the input is invalid, the output is:
invalid
The dates for each season are:
spring: March 20 - June 20
summer: June 21 - September 21
autumn: September 22 - December 20
winter: December 21 - March 19
My code is constantly outputting 'invalid, regardless of the date input.
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String inputMonth;
int inputDay;
inputMonth = scnr.next();
inputDay = scnr.nextInt();
if((inputMonth=="March"&&inputDay>19)||inputMonth=="April"||inputMonth=="May"||(inputMonth=="June"&&inputDay<21))
{
System.out.println("spring");
}
else if((inputMonth=="June"&&inputDay>20)||inputMonth=="July"||inputMonth=="August"||(inputMonth=="September"&&inputDay<22))
{
System.out.println("summer");
}
else if((inputMonth=="September"&&inputDay>21)||inputMonth=="October"||inputMonth=="November"||(inputMonth=="December"&&inputDay<21))
{
System.out.println("autumn");
}
else if((inputMonth=="December"&&inputDay>20)||inputMonth=="January"||inputMonth=="February"||(inputMonth=="March"&&inputDay<20))
{
System.out.println("winter");
}
else
{
System.out.println("invalid");
} }
}
1 answer:
Answer:
The problem here is you are comparing month names with == , in case of strings there is a difference between comparing with == and .equals. So I have changed that code please check now
Program:
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String inputMonth;
int inputDay;
System.out.print("Enter month:");
inputMonth = scnr.next();
System.out.print("Enter day of month");
inputDay = scnr.nextInt();
if((inputMonth.equalsIgnoreCase("march")&&inputDay>19)||inputMonth.equalsIgnoreCase("april")||inputMonth=="may"||(inputMonth.equalsIgnoreCase("june")&&inputDay<21))
{
System.out.println("spring");
}
else if((inputMonth.equalsIgnoreCase("june")&&inputDay>20)||inputMonth.equalsIgnoreCase("july")||inputMonth=="august"||(inputMonth.equalsIgnoreCase("september")&&inputDay<22))
{
System.out.println("summer");
}
else if((inputMonth.equalsIgnoreCase("september")&&inputDay>21)||inputMonth.equalsIgnoreCase("october")||inputMonth.equalsIgnoreCase("november")||(inputMonth.equalsIgnoreCase("December")&&inputDay<21))
{
System.out.println("autumn");
}
else if((inputMonth.equalsIgnoreCase("december")&&inputDay>20)||inputMonth.equalsIgnoreCase("january")||inputMonth.equalsIgnoreCase("february")||(inputMonth.equalsIgnoreCase("march")&&inputDay<20))
{
System.out.println("winter");
}
else
{
System.out.println("invalid");
} }
}
Output:
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Answer:
The java program for the given scenario is as follows.
import java.util.*;
import java.lang.*;
public class Main
{
//variables for bill and tip declared and initialized
static double bill=47.28, tip=0.15;
//variables for total bill and share declared
static double total, share1;
public static void main(String[] args) {
double total_tip= (bill*tip);
//total bill computed
total = bill + total_tip;
//share of each friend computed
share1 = total/2;
System.out.printf("Each person needs to pay: $%.2f", share1);
}
}
Explanation:
1. The variables to hold the bill and tip percent are declared as double and initialized with the given values.
static double bill=47.28, tip=0.15;
2. The variables to hold the values of total bill amount and total tip are declared as double.
3. All the variables are declared outside main() and at class level, hence declared as static.
4. Inside main(), the values of total tip, total bill and share of each person are computed as shown.
double total_tip= (bill*tip);
total = bill + total_tip;
share1 = total/2;
5. The share of each person is displayed to the user. The value is displayed with only two decimal places which is assured by %.2f format modifier. The number of decimal places required can be changed by changing the number, i.e. 2. This format is used with printf() and not with println() method.
System.out.printf("Each person needs to pay: $%.2f", share1);
6. The program is not designed to take any user input.
7. The program can be tested for any value of bill and tip percent.
8. The whole code is put inside a class since java is a purely object-oriented language.
9. Only variables can be declared outside method, the logic is put inside a method in a purely object-oriented language.
10. As shown, the logic is put inside the main() method and only variables are declared outside the method.
11. Due to simplicity, the program consists of only one class.
12. The output is attached.
