程序代码：

template<class object>
void show_ar(object::iterator a,object::iterator b)
{
    object::iterator p = a, p1 = b;
    for (; p != p1; ++p)
        cout << *p << ' ';
}

int main()
{
    using namespace std;
    vector<int> arint(4,3);
    vector<string> arstr(4, "xiaogang");
    show_ar<vector<int>>(arint.begin(),arint.end());//为什么此处编译无法通过呢？请讲解一下，谢了。
    cout << endl;
    show_ar<vector<string>>(arstr.begin(), arstr.end());
    cout << endl;
    system("pause");
    return 0;
}