I need to make this program which supposed to accept the dateform the user in format of YYYY-MM-DD and output the correspondingdate in its expanded format.
output should be something like: Enter the date in YYYY-MM-DD:2020-10-03
October o3, 2020

(in C++)

I have this program but there are some errors that I couldn'tfind.

// Lab3_Project_jk.cpp : This file contains the 'main' function.Program execution begins and ends there.
//

#include
#include
using namespace std;
int main()
{
   const unsigned int VALID_DASH_INDEX_1 = 4;
   const unsigned int VALID_DASH_INDEX_2 = 6;
   const unsigned int VALID_DATE_LENGTH = 10;
   const unsigned int MIN_VALID_DAY_NUM = 1;
   string inputDate, inputYear, inputMonth, inputDay,monthName;
   unsigned int dashIndex1, dashIndex2, invalidCharIndex,inputDateLength;
   unsigned int yearNum, dayNum{}, monthNum,maxValidDayNum = 31;
   bool inputDateValid = true;

   // Get a date from the user
   cout << \"Enter date in YYYY-MM-DD format:\";
   getline(cin, inputDate);

   // Check whether the input date has the correctformat
   dashIndex1 = inputDate.find(\"-\");
   dashIndex2 = inputDate.find(\"-\", dashIndex1 +1);
   invalidCharIndex =inputDate.find_first_not_of(\"0123456789-\");
   inputDateLength = inputDate.size();
   if ((dashIndex1 == VALID_DASH_INDEX_1)&&
       (dashIndex2 == VALID_DASH_INDEX_2)&&
       (invalidCharIndex == string::npos)&&
       (inputDateLength ==VALID_DATE_LENGTH))
   {
       // Extract the year, month and dayfrom the input date
       inputYear = inputDate.substr(0,dashIndex1);
       inputMonth =inputDate.substr(dashIndex1 + 1, dashIndex2 - dashIndex1 -1);
       inputDay =inputDate.substr(dashIndex2, inputDateLength - dashIndex2 - 1);

       // Convert the year, month andday to integers
       yearNum = stoi(inputYear);
       monthNum = stoi(inputMonth);
       dayNum = stoi(inputDay);

       // Determine the monthname
       switch (monthNum) {
       case1:
           monthName =\"January\";
           maxValidDayNum =31;
           break;
       case2:
           monthName =\"February\";
           maxValidDayNum =29;
           break;
       case3:
           monthName =\"March\";
           maxValidDayNum =31;
           break;
       case4:
           monthName =\"April\";
           maxValidDayNum =30;
           break;
       case5:
           monthName =\"May\";
           maxValidDayNum =31;
           break;
       case6:
           monthName =\"June\";
           maxValidDayNum =30;
           break;
       case7:
           monthName =\"July\";
           maxValidDayNum =31;
           break;
       case8:
           monthName =\"August\";
           maxValidDayNum =31;
       case9:
           monthName =\"September\";
           maxValidDayNum =30;
           break;
       case10:
           monthName =\"October\";
           maxValidDayNum =31;
           break;
       case11:
           monthName =\"November\";
           maxValidDayNum =30;
           break;
       case12:
           monthName =\"December\";
           maxValidDayNum =31;
           break;
       default:
           inputDateValid =false;
       }

       // Check whether the day numberis valid
       if ((dayNum < MIN_VALID_DAY_NUM)&& (dayNum > maxValidDayNum)) {
           inputDateValid =false;
       }
   }
   else {
       inputDateValid = true;
   }
   // Output the date in expanded format
   if (inputDateValid) {
       cout << monthName << \"\" << dayNum << \", \" << inputYear << \"\"<< endl;
   }
   else {
       cout << \"Invalid date format\"<< endl;
   }
   return 0;
}