Find the day of the week you were born!

// Please enter your birthday in this

// format(including spaces):

// DD MM YYYY

// 22 01 1997

#include <iostream>

 

using namespace std;

int main(void)

{

int DD = 32, MM = 13, YYYY = -1, NYYYY, NMM, IDAY, day, flag = 0;

string month[] = {“January”,”February”,”March”,”April”,”May”,”June”,”July”,

“August”,”September”,”October”,”November”,”December”};

cin >> DD;

cin >> MM;

cin >> YYYY;

//Error Message: User has given no input

if(DD == 32 && MM == 13 && YYYY == -1)

{

cout << ” Please enter your birthday in this ” << endl;

cout << ” format(including spaces): ” << endl;

cout << ” DD MM YYYY ” << endl;

cout << ” 22 01 1997 ” << endl;

return -1;

}

if(DD <= 0)

{

//Error Message: User has given invalid input for “Days” & “Months” fields

if(MM <= 0)

{

cout << ” We don’t have negative or null days and months. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

//Error Message: User has given invalid input for “Days” field

cout << ” We don’t have negative or null days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

if(MM <= 0)

{

//Error Message: User has given invalid input for “Months” field

cout << ” We don’t have negative or null months. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

if(DD > 31 || MM > 12 || YYYY <= 0)

{

if(DD > 31 && MM > 12)

{

//Error Message: User has given invalid input for “Days”, “Months” & “Years” fields

if(YYYY <= 0)

{

cout << ” We have 12 months, the days of a month are up to 31 ” << endl;

cout << ” and a year should be a positive number. ” << endl;

cout << ” Try again! ” << endl;

}

//Error Message: User has given invalid input for “Days” & “Months” fields

else

{

cout << ” We have 12 months and ” << endl;

cout << ” the days of a month are up to 31. ” << endl;

cout << ” Try again! ” << endl;

}

}

else if(DD > 31 && MM <= 12)

{

//Error Message: User has given invalid input for “Days” & “Years” fields

if(YYYY <= 0)

{

cout << ” The days of a month are up to 31 and ” << endl;

cout << ” a year should be a positive number. ” << endl;

cout << ” Try again! ” << endl;

}

//Error Message: User has given invalid input for “Days” field

else

{

cout << ” The days of a month are up to 31. ” << endl;

cout << ” Try again! ” << endl;

}

}

else if(DD <= 31 && MM > 12)

{

//Error Message: User has given invalid input for “Months” & “Years” fields

if(YYYY <= 0)

{

cout << ” We have 12 months and ” << endl;

cout << ” a year should be a positive number. ” << endl;

cout << ” Try again! ” << endl;

}

//Error Message: User has given invalid input for “Months” field

else

{

cout << ” We have 12 months. ” << endl;

cout << ” Try again! ” << endl;

}

}

//Error Message: User has given invalid input for “Years” field

else if(DD <= 31 && MM <= 12 && YYYY <= 0)

{

cout << ” A year should be a positive number. ” << endl;

cout << ” Try again! ” << endl;

}

return -1;

}

switch(MM)

{

case 2:

if((YYYY % 400) == 0 || ((YYYY % 4) == 0 && (YYYY % 100) != 0))

{

//Error Message: User has requested an invalid day for the month “February”

// and the requested “Year” is a leap year.

if(DD > 29)

{

cout << ” The year ” << YYYY << ” is a leap year. ” << endl;

cout << ” So, February has up to 29 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

}

else

{

//Error Message: User has requested an invalid day for the month “February”

// and the requested “Year” is not a leap year.

if(DD > 28)

{

cout << ” The year ” << YYYY << ” isn’t a leap year. ” << endl;

cout << ” So, February has up to 28 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

}

break;

case 4:

//Error Message: User has requested an invalid day for the month “April”

if(DD > 30)

{

cout << ” April has up to 30 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

break;

case 6:

//Error Message: User has requested an invalid day for the month “June”

if(DD > 30)

{

cout << ” June has up to 30 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

break;

case 9:

//Error Message: User has requested an invalid day for the month “September”

if(DD > 30)

{

cout << ” September has up to 30 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

break;

case 11:

//Error Message: User has requested an invalid day for the month “November”

if(DD > 30)

{

cout << ” November has up to 30 days. ” << endl;

cout << ” Try again! ” << endl;

return -1;

}

break;

}

if(MM <= 2)

{

NYYYY = YYYY – 1;

NMM = 0;

}

else

{

NYYYY = YYYY;

NMM = (4 * MM + 23) / 10;

}

//Calculating the day

IDAY = 365 * YYYY + DD + 31 * (MM – 1) – NMM + (NYYYY / 4) – ((3 * ((NYYYY / 100) + 1) / 4));

day = IDAY % 7;

//This ‘flag’ is used for displaying the right ending after the numbers

if(DD != 11 && DD != 12 && DD != 13)

flag = DD % 10;

switch(day)

{

case 0:

cout << ” You were born on Saturday, “;

break;

case 1:

cout << ” You were born on Sunday, “;

break;

case 2:

cout << ” You were born on Monday, “;

break;

case 3:

cout << ” You were born on Tuesday, “;

break;

case 4:

cout << ” You were born on Wednesday, “;

break;

case 5:

cout << ” You were born on Thursday, “;

break;

case 6:

cout << ” You were born on Friday, “;

break;

}

if(flag == 1){

cout << DD << “st of “;

}

else if(flag == 2){

cout << DD << “nd of “;

}

else if(flag == 3){

cout << DD << “rd of “;

}

else{

cout << DD << “th of “;

}

cout << month[MM-1] << ” of ” << YYYY << “!” << endl;

cout << “\n And if you liked it, ” << endl;

cout << ” don’t forget to give a (+1) like! ” << endl;

cout << ” Thank you! ” << endl;

return 0;

}

 

Topics Covered :

c++(programming language)

c++programming language tutorial

c programming course

proramming journey

c++programming

c programming for beginners

programiz learn programming

language basics

learn c programming

 

 

 

 

 

 

 

 

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