Matching Elements Using the equals and mismatch Operations

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

template<class Container, class Iterator>
void ShowElement(Container& c, Iterator& itor);

int main()
{
    typedef vector<int>::iterator    VectorInterator;
    vector<int>    intValueVector(4);
    intValueVector[0] = 1;
    intValueVector[1] = 2;
    intValueVector[2] = 3;
    intValueVector[3] = 4;

    vector<int>    intValueVector2(3);
    intValueVector2[0] = 1;
    intValueVector2[1] = 2;
    intValueVector2[2] = 3;

    VectorInterator    first1 = intValueVector.begin();
    VectorInterator    last1  = intValueVector.end();
    VectorInterator    first2 = intValueVector2.begin();
    if (equal(first1, last1, first2))
        cout << "intValueVector == intValueVector2\n";
    else
        cout << "intValueVector != intValueVector2\n";

    pair<VectorInterator, VectorInterator> pi = mismatch(first1, last1, first2);
    cout << "First mismatch element in intValueVector = ";
    ShowElement(intValueVector, pi.first);
    cout << "\n";
    cout << "First mismatch element in intValueVector2 = ";
    ShowElement(intValueVector2, pi.second);
    cout << "\n";

    return 0;
}

template<class Container, class Iterator>
void ShowElement(Container& c, Iterator& itor)
{
    if (itor != c.end())
    {
        if (itor != c.begin())
            cout << *itor << "\tthe previous element is " << *(itor - 1);
        else
            cout << "first";
    }
    else
        cout << "last";
}

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Matching Elements Using the equals and mismatch Operations : Vector « Data Structure « C++

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