Comparing loops

// Comparing.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <vector>
#include <algorithm>
#include <numeric>
#include <string>

using namespace std;

int main()
{
    vector<int> a{ 1, 2, 3, 4 , 5};
    vector<int> b{ 1, 2, 0, 4 };

    bool same = a.size()==b.size();
    for (size_t i = 0; i < a.size() && same; i++)
    {
        if (a[i] != b[i])
        {
            same = false;
        }
    }

    same = equal(begin(a), end(a), begin(b), end(b));

    auto firstchange = mismatch(begin(a), end(a), begin(b));

    int avalue = *(firstchange.first);  //Because both are iterators you put put the star before them
    int bvalue = *(firstchange.second);
    auto distance = firstchange.first - begin(a);

    int total = 0;
    for (int i : a)
    {
        total += i;
    } //Get the total of values on the vector

    //total = accumulate(begin(a), end(a), 0);//Get the total of values on the vector
    total = accumulate(begin(a), end(a), 0,
        [](int total, int i) {if (i % 2 == 0) return total + i; return total; }); //The if(i % 2 == 0) check if the number is even or not (Even = par) //THen return only the even numbers, otherwise will return the original total
    total = accumulate(begin(a), end(a), 1,
        [](int total, int i) {return total * i; });//Multiply the sequence

    vector<string> words{ "one","two","three" };
    auto allwords = accumulate(begin(words), end(words), string{});
    int length = allwords.size();
    allwords = accumulate(begin(words), end(words), string{"Words:"}, [](const string& total, string& s) {return total + " " + s; });
    length = allwords.size();

    string s = accumulate(begin(a), end(a), string{"The numbers are:"},
        [](const string& total, int i) {return total + " " + to_string(i); });

    b = a;
    for (auto it = begin(b); it != end(b); it++)
    {
        *it = 0;
    }

    for (auto& i : b) //The auto& with the reference to acctually change the value on b and not create something just for the loop
    {
        i = 1;
    }

    for_each(begin(b), end(b), [](int& elem) {elem = 2; });//Int reference on the same way to make the change on the above as well

    b = a;
    auto firstthree = find(begin(b), end(b), 3);
    for_each(firstthree, end(b), [](int& elem) {elem = 0; });


    return 0;
}