Example usage of std::mismatch algorithm.

mismatch.cpp

#include <string>
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main(int argc, char *argv[])
{
    vector<string> dogPeople = { "James", "Mary", "Tim", "Jane", "Greg" };
    vector<string> catPeople = { "James", "Mary", "Lucy", "Roger", "Sam" };

    // check for mismatches
    pair<vector<string>::iterator, vector<string>::iterator> result =
            std::mismatch(dogPeople.begin(), dogPeople.end(), catPeople.begin());

    // analyze the result for a mismatch
    if (result.first == dogPeople.begin() && dogPeople.at(0) == catPeople.at(0))
        cout << "No mismatch" << endl;
    else
        cout << "Mismatch at " << (result.first - dogPeople.begin()) << ". " << *result.first << " != " << *result.second << endl;
}