Java生日計算邏輯錯誤

Question

如果生日在當月之後的月份，計算器只返回正確的值。我一直在努力這一段時間，我不知道如何解決這個邏輯錯誤。請，任何幫助將非常感激。

import java.util.*; 

public class BirthdayCalculator { 

    public static void main(String[] args) { 
     System.out.println("Enter the current month numerically (i.e. if it is July, enter 7)"); 
     Scanner console = new Scanner (System.in); 
     int monthIs = console.nextInt(); 
     System.out.println("Enter today's date"); 
     int todayIs = console.nextInt(); 
     System.out.println("Enter person 1's birth month"); 
     int birthMonthOne = console.nextInt(); 
     System.out.println("Enter person 1's birthday"); 
     int birthDayOne = console.nextInt(); 
     System.out.println("Enter person 2's birth month"); 
     int birthMonthTwo = console.nextInt(); 
     System.out.println("Enter person 2's birthday"); 
     int birthDayTwo = console.nextInt(); 
     int daysUntilEndOfMonth = getMonth(monthIs, todayIs, 0); 
     int totalDaysOne = monthsUntilBirthMonth(monthIs, birthMonthOne, 0); 
     int totalDaysTwo = monthsUntilBirthMonth(monthIs, birthMonthTwo, 0); 
     finalReport(daysUntilEndOfMonth, totalDaysOne, totalDaysTwo, birthDayOne, birthDayTwo); 
    } 

    public static int getMonth(int monthIs, int todayIs, int daysUntilEndOfMonth) { 
     if (monthIs == 2) { 
      daysUntilEndOfMonth = 28 - todayIs; //days until end of february 
     } else if (monthIs == 1 || monthIs == 3 || monthIs == 5 || monthIs == 7 || monthIs == 8 || monthIs == 10 || monthIs == 12) { 
      daysUntilEndOfMonth = 31 - todayIs; //days until end of months with 31 days 
     } else { 
      daysUntilEndOfMonth = 30 - todayIs; //days until end of month with 30 days 
     } 
     return daysUntilEndOfMonth; 
    } 

    public static int monthsUntilBirthMonth(int initialMonth, int endMonth, int totalDays) { 
     if (initialMonth == 12) { // makes sure that largest month is december 
      initialMonth = 1; 
     } else { 
      initialMonth = initialMonth + 1; 
     } 
     if (initialMonth < endMonth) { 
      for (int i = initialMonth; i < endMonth; i++) { //adds total days until birthday until month of birthday is reached 
      if (i == 2) { 
       totalDays = totalDays + 28; 
      } else if (i == 1 || i == 3 || i == 5 ||i == 7 || i == 8 || i == 10 || i == 12) { 
       totalDays = totalDays + 31; 
      } 
       totalDays = totalDays + 30; 
      } 
     } else if (initialMonth > endMonth) { //if the birthday is earlier than the current month, 
      for (int i = endMonth; i <= initialMonth - 1; i++) { //adds total days until birthday until month of birthday is reached 
      if (i == 2) { 
       totalDays = totalDays + 28; 
      } else if (i == 1 || i == 3 || i == 5 ||i == 7 || i == 8 || i == 10 || i == 12) { 
       totalDays = totalDays + 31; 
      } 
       totalDays = totalDays + 30; 
      } 
      totalDays = 365 - totalDays; 
     } 
     return totalDays; 
    } 

    public static void finalReport(int daysUntilEndOfMonth, int totalDaysOne, int totalDaysTwo, int birthDayOne, int birthDayTwo) { 
     int untilOne = daysUntilEndOfMonth + totalDaysOne + birthDayOne; //calculates days until first person's birthday 
     int untilTwo = daysUntilEndOfMonth + totalDaysTwo + birthDayTwo; //calculates days until second person's birthday 
     System.out.print("There are " + untilOne + " days until person 1's birthday\n"); //reports number of days until birthday 1 
     System.out.print("There are " + untilTwo + " days until person 2's birthday\n"); //reports number of days until birthday 1 
     if (untilOne < untilTwo) { //figures out which birthday is sooner 
      System.out.println("Person 1's birthday is sooner."); 
     } else { 
      System.out.println("Person 2's birthday is sooner."); 
     } 
    } 
} 

Answer 1

if (initialMonth < endMonth) { 
    for (int i = initialMonth; i < endMonth; i++) { // adds total days until birthday until month of birthday is reached 
     if (i == 2) { 
      totalDays = totalDays + 28; 
     } else if (i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12) { 
      totalDays = totalDays + 31; 
     } else { 
      totalDays = totalDays + 30; 
     } 
    } 
} else if (initialMonth > endMonth) { // if the birthday is earlier than the current month, 
    for (int i = endMonth; i <= initialMonth - 1; i++) { // adds total days until birthday until month of birthday is reached 
     if (i == 2) { 
      totalDays = totalDays + 28; 
     } else if (i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12) { 
      totalDays = totalDays + 31; 
     } else { 
      totalDays = totalDays + 30; 
     } 
    } 
    totalDays = 365 - totalDays; 
} 

你忘了把別人塊totalDays = totalDays + 30;