vector<float>如何实现元素存入和读取

vector<float>是一个动态数组，可以使用push_back()函数将元素存入vector中，使用下标运算符[]或者at()函数读取元素。例如，下面的代码演示了如何存入和读取vector<float>中的元素：

#include <iostream>
#include <vector>

int main() {
    std::vector<float> vec;
    vec.push_back(1.0);
    vec.push_back(2.0);
    vec.push_back(3.0);

    std::cout << "The elements in the vector are: ";
    for (int i = 0; i < vec.size(); i++) {
        std::cout << vec[i] << " ";
    }
    std::cout << std::endl;

    std::cout << "The second element in the vector is: " << vec.at(1) << std::endl;

    return 0;
}

输出结果为：

The elements in the vector are: 1 2 3
The second element in the vector is: 2