C++ vector遍历方法详解

std::vector vec = {1, 2, 3, 4, 5};
for (const auto& item : vec) {
    std::cout << item << " ";
}

std::vector vec = {1, 2, 3, 4, 5};
for (auto it = vec.begin(); it != vec.end(); ++it) {
    std::cout << *it << " ";
}

for (auto rit = vec.rbegin(); rit != vec.rend(); ++rit) {
    std::cout << *rit << " ";
}

std::vector vec = {1, 2, 3, 4, 5};
for (size_t i = 0; i < vec.size(); ++i) {
    std::cout << "vec[" << i << "] = " << vec[i] << "\n";
}

std::vector vec = {1, 2, 3, 4, 5};
int* ptr = vec.data();
int* end = ptr + vec.size();
while (ptr < end) {
    std::cout << *ptr << " ";
    ++ptr;
}

std::vector vec = {1, 2, 3, 4, 5};
std::for_each(vec.begin(), vec.end(), [](const int& n) {
    std::cout << n << " ";
});