vector<stirng> array1;
vector<string> array2;
array1.push_back("Hello World");
 
// copy the first string in array1 into array2
array2.push_back(array1[0]);

string TempExam;
while(i <TempStudentVec.size())
{
    ExamIter = StudIter[i].Exam.begin();
    TEMPLarge.NoOfStudent=0;
 
    if(StudIter[i].Exam.size())
    {
        TempExam = ExamIter[0];
        TEMPLarge.Exam.push_back(TempExam);
        TEMPLarge.NoOfStudent++;
        StudIter[i].Exam.erase(StudIter[i].Exam.begin());
        j=1;
        while(j < TempStudentVec.size())
        {
            ExamIter2 = StudIter[j].Exam.begin();
            k =0;
            while (k<StudIter[j].Exam.size())
            {
                if (ExamIter2[0] == TEMPLarge.Exam)
                {
                TEMPLarge.NoOfStudent++;
                ............................
                }
            }
        }
    }
}

#include <vector>
#include <string>
#include <iostream>
#include <algorithm>
#include <functional> 
 
using namespace std ;
 
int main()
{
    string init_arr1[5] = { "ONE", "TWO", "THREE", "FOUR", "FIVE" };
    string init_arr2[10] = { "ONE", "FIVE", "FOUR", "FIVE", "THREE", "FOUR", "THREE", "FOUR", "ONE", "THREE" };
 
    vector<string> v1(init_arr1, init_arr1 + 5 ) ;
    vector<string> v2(init_arr2, init_arr2 + 10 ) ;
    //vector<string> v1(init_arr1, init_arr1 + sizeof(init_arr1)/sizeof(*init_arr1)) ;
    //vector<string> v2(init_arr2, init_arr2 + sizeof(init_arr2)/sizeof(*init_arr2)) ;
 
 
    cout << "count() example" << endl ;
    //want to find how many times each string in v1 occures in v2
    vector<string>::iterator it = v1.begin() ;
    for( ; it != v1.end(); it++ )
    {
        size_t tmp_count = count( v2.begin(), v2.end(), *it ) ;
        cout << (*it).c_str() << " occured in v2 " << tmp_count << " time(s)." << endl ;
    }
 
    int init_arri1[5] = { 1, 2, 3, 4, 5 };
    int init_arri2[10] = { 1, 5, 4, 5, 3, 4, 3, 4, 1, 3 };
 
    vector<int> vi1(init_arri1, init_arri1 + 5 ) ;
    vector<int> vi2(init_arri2, init_arri2 + 10 ) ;
    //vector<int> vi1(init_arri1, init_arri1+sizeof(init_arri1)/sizeof(*init_arri1)) ;
    //vector<int> vi2(init_arri2, init_arri2+sizeof(init_arri2)/sizeof(*init_arri2)) ;
 
    cout << endl << endl << "count_if() example" << endl ;
    //Here is an example of conditional find.. it counts the
    //numbers greater than given number (instead of equal)
    vector<int>::iterator iit = vi1.begin() ;
    for( ; iit != vi1.end(); iit++ )
    {
        size_t tmp_count = count_if( vi2.begin(), vi2.end(), bind2nd(greater<int>(), *iit) ) ;
        cout << tmp_count << " element(s) in vi2 are greater than " << (*iit) << endl ;
    }
 
 
    return 0 ;
}