C++遍历vector

下面是遍历C++中vector的一个例子：

#include <iostream>
#include <vector>

int main() {
    std::vector<int> my_vector = {1, 2, 3, 4, 5};

    // 方法1：使用迭代器遍历
    std::cout << "Using Iterator: ";
    for (std::vector<int>::iterator it = my_vector.begin(); it != my_vector.end(); ++it) {
        std::cout << *it << " ";
    }
    std::cout << std::endl;

    // 方法2：使用索引遍历
    std::cout << "Using Index: ";
    for (int i = 0; i < my_vector.size(); i++) {
        std::cout << my_vector[i] << " ";
    }
    std::cout << std::endl;

    // 方法3：使用范围for循环遍历
    std::cout << "Using Range-based for loop: ";
    for (int x : my_vector) {
        std::cout << x << " ";
    }
    std::cout << std::endl;

    return 0;
}

输出结果：

Using Iterator: 1 2 3 4 5 
Using Index: 1 2 3 4 5 
Using Range-based for loop: 1 2 3 4 5