Find the day of week you were born cpp Program
Find the day of the week you were born cpp
Please enter your birthday in this
Format(including spaces):
DD MM YYYY
22 01 1997
I think that I have covered all possible
wrong inputs (17 by now)!
Please let me know if you find any other
bugs or wrong inputs that I haven't covered.
Thank you all for your support.
#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;
}
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
