class renewBooks
{
public:
	int getItems()
	{
		cout << "Please scan the barcode of the book you would like to renew:\n";
		cin >> renewBarcode;
		processItems(renewBarcode);
		return false;
	}


private:
	string renewBarcode;
	string toRenewItem;
		
#include <time.h>
#include <stdio.h>
#include <string.h>
	int processItems(string toRenewItem)
	{
   		struct tm newtime;
		char am_pm[] = "AM";
		time_t long_time;
		char timebuff [26];
		errno_t err;

		//Get time as a 64 bit integer
		time( &long_time );
		// Convert to local time
		err = _localtime64_s( &newtime, &long_time );
		if (err)
		{
			printf( "Invalid argument to _local time64_s.");
			exit(1);
		}

		if(newtime.tm_hour > 12)
			strcpy_s(am_pm, sizeof(am_pm), "PM");
		if (newtime.tm_hour > 12)
			newtime.tm_hour -= 12;
		if (newtime.tm_hour == 0)
			newtime.tm_hour = 12;

		// This is where the error is:[
		newtime.tm_mday += 14;
		// ]This is where the error ends
		
		// Convert to an ASCII representation
		err = asctime_s(timebuff, 26, &newtime);
		if (err)
		{
			printf ( "Invalid argument to asctime_s.");
			exit(1);
		}
			
		ofstream renew ("renewBooks.txt", std::ios::app);

		renew << "Date: "
			  << "\nTime: "
			  << "\nDue date: ";
	    renew printf( "%.19s %s\n", timebuff, am_pm );
	    renew << "\nBook barcode: "
			  << toRenewItem;
		
		renew.close();
		return false;
	}
};

    newtime.tm_mday += 14;
    // mktime can accept "bad" day of month
    time_t xtime = mktime(&newtime);
    // refresh newtime structure
    _localtime64_s(&newtime,&xtime);