// Please enter your birthday in this // format(including spaces): // DD MM YYYY // 22 01 1997 #include 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"}; string dayOfBirth[] = {"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"}; cin >> DD; cin >> MM; cin >> YYYY; if(DD == 32 && MM == 13 && YYYY == -1) { //Error Message: User has given no imput 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" field cout << " We don't have negative or null days. " << endl; cout << " Try again! " << endl; return -1; } else 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) { cout << " The days of a month are up to 31 OR " << endl; cout << " the number of the month are up to 12 OR " << endl; 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)) { if(DD > 29) { // Error Message: User has requested an invalid day for the month "February" // and the requested "Year" is a leap year. 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 { if(DD > 28) { //Error Message: User has requested an invalid day for the month "February" // and the requested "Year" is not a leap year. 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: case 6: case 9: case 11: //Error Message: User has requested an invalid day for the month if(DD > 30) { cout << month[MM-1] << " 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; cout << " You were born on "<< dayOfBirth[day] << " "; 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; }

day.of.birth