// Please enter your birthday in this // format(including spaces): // [DD MM YYYY] // [01 01 1997] #include using namespace std; int main() { 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; if(DD == 32 && MM == 13 && YYYY == -1) { cout << "Please enter your birthday in this\n"; cout << " format(including spaces): \n"; cout << " [DD MM YYYY] \n"; cout << " [01 01 1997] \n"; return -1; } if(DD <= 0) { if(MM <= 0) { cout << "We don't have negative or null days and months. Try again!"; return -1; } cout << "We don't have negative or null days. Try again!"; return -1; } if(MM <= 0) { cout << "We don't have negative or null months. Try again!"; return -1; } if(DD > 31 || MM > 12 || YYYY <= 0) { if(DD > 31 && MM > 12 && YYYY <= 0) { cout << "We have 12 months, the days of a month are up to 31\nand a year should be a positive number. Try again!"; } else if(DD > 31 && MM > 12 && YYYY > 0) { cout << "We have 12 months and the days of a month are up to 31. Try again!"; } else if(DD > 31 && MM <= 12 && YYYY <= 0) { cout << "The days of a month are up to 31 and a year should be a positive number. Try again!"; } else if(DD > 31 && MM <= 12 && YYYY > 0) { cout << "The days of a month are up to 31. Try again!"; } else if(DD <= 31 && MM > 12 && YYYY <= 0) { cout << "We have 12 months and a year should be a positive number. Try again!"; } else if(DD <= 31 && MM > 12 && YYYY > 0) { cout << "We have 12 months. Try again!"; } else if(DD <= 31 && MM <= 12 && YYYY <= 0) { cout << "A year should be a positive number. Try again!"; } return -1; } switch(MM) { case 2: if((YYYY % 400) == 0) { if(DD > 29) { cout << "The year " << YYYY << " is a leap year. So, February has up to 29 days. Try again!" << endl; return -1; } } else if((YYYY % 4) == 0 && (YYYY % 100) != 0) { if(DD > 29) { cout << "The year " << YYYY << " is a leap year. So, February has up to 29 days. Try again!" << endl; return -1; } } else { if(DD > 28) { cout << "The year " << YYYY << " isn't a leap year. So, February has up to 28 days. Try again!" << endl; return -1; } } break; case 4: if(DD > 30){ cout << "April has up to 30 days. Try again!" << endl; return -1; } break; case 6: if(DD > 30){ cout << "June has up to 30 days. Try again!" << endl; return -1; } break; case 9: if(DD > 30){ cout << "September has up to 30 days. Try again!" << endl; return -1; } break; case 11: if(DD > 30){ cout << "November has up to 30 days. Try again!" << endl; return -1; } break; } if(MM <= 2) { NYYYY = YYYY - 1; NMM = 0; } else { NYYYY = YYYY; NMM = (4 * MM + 23) / 10; } IDAY = 365 * YYYY + DD + 31 * (MM - 1) - NMM + (NYYYY / 4) - ((3 * ((NYYYY / 100) + 1) / 4)); day = IDAY % 7; 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 " << month[MM-1] << " of " << YYYY << "!" << endl; } else if(flag == 2){ cout << DD << "nd of " << month[MM-1] << " of " << YYYY << "!" << endl; } else if(flag == 3){ cout << DD << "rd of " << month[MM-1] << " of " << YYYY << "!" << endl; } else{ cout << DD << "th of " << month[MM-1] << " of " << YYYY << "!" << endl; } cout << "\n\nAnd if you liked it, don't forget to give a (+1) like!"; cout << "\n\nThank you!" << endl; return 0; }

Day of your Birth by entering Date