Zeller's congruence is an algorithm developed to calculate the day of the week. Write a program that prompts the user
to enter a year, month, day of month and it displays the name of the week.
Here is my source code. I need it broke down into a flowchart.
public static void main(String[] args) {
//all variables are initialized to
0, because local variables require at least an initial value before
use
Scanner input = new
Scanner(System.in); // creation of scanner object for user
input
int year = 0, month = 0; //
variables for collecting user input
int k = 0, j = 0, dayOfWeek = 0,
dayOfMonth = 0;; // j = century, k = year of century
System.out.println("**********Zeller's
congruence**********\n");
//System.out.println();
System.out.print("Enter year: eg
2012: ");
year = input.nextInt();
System.out.print("Enter month:
1-12: ");
month = input.nextInt();
while (month > 12) {
System.out.println("There are no more than 12 months in a year, try
again");
System.out.print("Enter month: 1-12: ");
month =
input.nextInt();
}
System.out.print("Enter the day of
the month: 1-31: ");
dayOfMonth = input.nextInt();
while (dayOfMonth > 31) {
System.out.println("There is never more than 31 days in a month,
try again");
System.out.print("Enter the day of the month: 1-31: ");
dayOfMonth =
input.nextInt();
}
k = year % 100;
j = year / 100;
if (month <= 2) {
month +=
12;
}
dayOfWeek = dayOfMonth + 26 *
(month + 1) / 10 + k + k / 4 + j / 4 + 5 * j;
dayOfWeek = dayOfWeek %
7;
if (dayOfWeek == 0) {
System.out.print("Day of the week is Friday");
}
else if (dayOfWeek == 1) {
System.out.print("Day of the week is Saturday");
}
else if (dayOfWeek == 2) {
System.out.print("Day of the week is Sunday");
}
else if (dayOfWeek == 3) {
System.out.print("Day of the week is Monday");
}
else if (dayOfWeek == 4) {
System.out.print("Day of the week is Tuesday");
}
else if (dayOfWeek == 5) {
System.out.print("Day of the week is Wednesday");
}
else if (dayOfWeek == 6) {
System.out.print("Day of the week is Thursday");
}
input.close();
System.out.println("\n");
System.out.print("**********By
Mohamed Diakite**********");
}
}
//pls provide +ve rating,thanks!!
=====================================
import java.util.*;
import javax.lang.model.util.ElementScanner6;
class Main {
public static void main(String[] args) {
//System.out.println("Hello world!");
//all variables are initialized to 0, because local variables require at least an initial value before use
Scanner input = new Scanner(System.in); // creation of scanner object for user input
int year = 0, month = 0; // variables for collecting user input
int k = 0, j = 0, dayOfWeek = 0, dayOfMonth = 0;; // j = century, k = year of century
System.out.println("**********Zeller's congruence**********\n");
//System.out.println();
System.out.print("Enter year: eg 2012: ");
year = input.nextInt();
System.out.print("Enter month: 1-12: ");
month = input.nextInt();
while (month > 12) {
System.out.println("There are no more than 12 months in a year, try again");
System.out.print("Enter month: 1-12: ");
month = input.nextInt();
}
System.out.print("Enter the day of the month: 1-31: ");
dayOfMonth = input.nextInt();
while (dayOfMonth > 31) {
System.out.println("There is never more than 31 days in a month, try again");
System.out.print("Enter the day of the month: 1-31: ");
dayOfMonth = input.nextInt();
}
//I changed you code from here ,CHEGGEA
int X,Y,Z,W,A,B,C,D;
B=dayOfMonth;
D=year/100;;
C=year;
if(month == 1)
{
A = 11;
C -= 1;
}
else if (month ==2)
{
A = 12;
C -= 1;
}
else
{
A=month-2;
}
//calculate W,X,Y,Z and R by using algorithm given
C%=100;
D=year/100;
W = (13 * A - 1) / 5;
X = C / 4;
Y = D / 4;
Z = W + X + Y + B + C - 2 * D;
dayOfWeek = Z % 7;
if (dayOfWeek < 0)
{
dayOfWeek += 7;
}
//Up to here, CHEGGEA
//commented your code below..CHEGGEA
/*k = year % 100;
j = year / 100;
if (month <= 2) {
month += 12;
}
dayOfWeek = dayOfMonth + 26 * (month + 1) / 10 + k + k / 4 + j / 4 + 5 * j;
dayOfWeek = dayOfWeek % 7; */
if (dayOfWeek == 0) {
System.out.print("Day of the week is Sunday");
}
else if (dayOfWeek == 1) {
System.out.print("Day of the week is Monday");
}
else if (dayOfWeek == 2) {
System.out.print("Day of the week is Tuesday");
}
else if (dayOfWeek == 3) {
System.out.print("Day of the week is Wednesday");
}
else if (dayOfWeek == 4) {
System.out.print("Day of the week is Thursday");
}
else if (dayOfWeek == 5) {
System.out.print("Day of the week is Friday");
}
else if (dayOfWeek == 6) {
System.out.print("Day of the week is Saturday");
}
input.close();
System.out.println("\n");
System.out.print("**********By Mohamed Diakite**********");
}
}
===================================
//output1
**********Zeller's congruence**********
Enter year: eg 2012: 2019
Enter month: 1-12: 2
Enter the day of the month: 1-31: 18
Day of the week is Monday
//output2
**********Zeller's congruence**********
Enter year: eg 2012: 2019
Enter month: 1-12: 3
Enter the day of the month: 1-31: 12
Day of the week is Tuesday
//output3
**********Zeller's congruence**********
Enter year: eg 2012: 2018
Enter month: 1-12: 30
There are no more than 12 months in a year, try again
Enter month: 1-12: 12
Enter the day of the month: 1-31: 30
Day of the week is Sunday
//output4
**********Zeller's congruence**********
Enter year: eg 2012: 2018
Enter month: 1-12: 1
Enter the day of the month: 1-31: 31
Day of the week is Wednesday
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