问题
I need to cout a vector. Not just an element of it, but the whole thing. For example std::cout << vectorName; Something like that, hope it makes sense. Any ideas? Thanks in advance
回答1:
You can either define a utility function like
template <typename T>
ostream& operator<<(ostream& output, std::vector<T> const& values)
{
for (auto const& value : values)
{
output << value << std::endl;
}
return output;
}
Or iterate yourself
for (auto const& value : values)
{
std::cout << value << std::endl;
}
回答2:
Yes, it is possible - if you define operator<< for your vector. Something like this:
template <class T>
std::ostream& operator<<(ostream& out, const std::vector<T>& container) {
out << "Container dump begins: ";
std::copy(container.cbegin(), container.cend(), std::ostream_iterator<T>(" ", out));
out << "\n";
return out;
}
来源：https://stackoverflow.com/questions/32785418/c-is-it-possible-to-cout-a-whole-vector