//////////////////////// // Days of the week /////////////////////// // by Paul Caron /////////////////////// #include #include #include using namespace std; ////////////////////////// // Secondary Functions /////////////////////////////// bool isLeapYear(int year){ if(year%4==0&&year%100!=0){ return true; }else if(year%400==0){ return true; } return false; } int daysOfYear(int day, int month, int year){ int total=0; switch(month){ case 11:total+=30; case 10:total+=31; case 9:total+=30; case 8:total+=31; case 7:total+=31; case 6:total+=30; case 5:total+=31; case 4:total+=30; case 3:total+=31; case 2:total+=isLeapYear(year)?29:28; case 1:total+=31; } total+=day; return total; } ///////////////////////////// // MAIN MAIN MAIN MAIN ////////////////////////////// //jan 1 2017 was a sunday int main() { string daysOfWeek[7]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; string months[12]={"January","February","March","April","May","June","July","August","September","October","November","December"}; int month,year,day; string input; getline(cin,input); //numbers code 48-57; string date[3]; int subNum=0; for(unsigned i=0; i57)){ cout<< "Enter valid date format, year-month-day, like : 2018.10.30 or 2018 10 30 or 2018/10/30 or 2018-10-30 or 2018x10x30"; return 0; }else if(input[i]>=48&&input[i]<=57){ date[subNum]+=input[i]; }else{ subNum++; } } if(subNum!=2){ cout<< "Enter valid date format, year-month-day, like : 2018.10.30 or 2018 10 30 or 2018/10/30 or 2018-10-30 or 2018x10x30"; return 0; } int dateInt[3]; for(unsigned i=0;i<3;i++){ stringstream strm(date[i]); strm>>dateInt[i]; if(dateInt[i]>40000||dateInt[i]<1){ cout<< "Enter valid date format, year-month-day, like : 2018.10.30 or 2018 10 30 or 2018/10/30 or 2018-10-30 or 2018x10x3"; return 0; } } year=dateInt[0]; month=dateInt[1]-1; day=dateInt[2]-1; cout<=2017){ for(int i=2017;i

Day of the Week