Поиск по определенному полю в массиве структур

//2.    Ñòðóêòóðà DateTime õðàíèò èíôîðìàöèþ î äàòå â ñëåäóþùåì ôîðìàòå: äåíü - Day (1..31), ìåñÿö - Month (ïåðå÷èñëåíèå), ãîä - Year (íå áîëåå 2100), ÷àñ - Hour (0..24), ìèíóòû - Minute (0..60), ñåêóíäû - Secund (0..60).
#include <iostream>
#include <cstdlib>
#include <time.h>
using namespace std;
typedef unsigned short int usInt;
 
 
enum Month{JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC};
char *MonthName[12]={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
 
 struct DateTime 
{                
    usInt Day;      
    Month Mont;       
    usInt Year;   
    usInt Hour;
    usInt Minute;
    usInt Secund;    
};
 
const usInt n=10;
usInt h, k=0;
void initDateTime(struct DateTime &dt);
int main(int argc, char** argv)
 {
    cout<< "Vvedite chislo: ";
    cin >> h;
    cout<<"\n";
     srand(time(NULL));
     DateTime time[n];
    for(int i=0; i<n; i++)
     initDateTime(time[i]);
      cout<<"Otvet: "<<k;
    system ("PAUSE");
    return 0;
} 
 
 void initDateTime (struct DateTime &dt)
{
 
    DateTime d;
    d.Day = rand()%(28)+1;  
    d.Mont = (Month)(rand()%12);
    d.Year = rand()%(2100-1900+1)+1900;
    cout<<d.Day<<"."<< MonthName[d.Mont] <<"." <<d.Year<<"    "<<endl;
    d.Hour = rand()%(24);
    d.Minute = rand()%(60);
    d.Secund = rand()%(60);
    cout<<d.Hour<<":" <<d.Minute<<":"<<d.Secund<<"\n-------------------"<<endl;
    if (d.Day==h) k++;
}