Simple Re-sizable vector of pointers

#include <iostream>
#include <vector>

template <class M = std::string, class E = int>
E log(M msg, E error = 0)
{
    std::cout << msg;
    return error;
}

struct Cell
{
    int index;
};

std::vector<Cell*> vecInt;


void showVec()
{
    log("\n Vec = ");
    for (auto & it: vecInt)
    {
        std::cout << "[ " << it->index << " ]";
    }
}

void resizeVec(unsigned newSize)
{
    if (newSize < vecInt.size())
    {
        for (int i=0; i < newSize - 1; ++i)
        {
            delete vecInt.back();
            vecInt.pop_back();
        }

        vecInt.resize(newSize);
    }
    else if (newSize > vecInt.size())
    {
        vecInt.resize(newSize, new Cell{0});
    }
    else if (newSize == vecInt.size())
    {
        log ("\n Nothing to resize !\n");
    }

}


int main()
{

    for (int i=0; i<5; ++i)
    {
        vecInt.push_back(new Cell{i});
    }

    showVec();
    resizeVec(7);
    showVec();
    resizeVec(4);
    showVec();

    resizeVec(4);
    showVec();

    return log("\n--- End of Main ---\n");
}