c++动态分配内存详解：如何使用变量实现高效内存管理

#include <iostream>

int main() {
    int n;
    std::cout << "Enter the number of elements: ";
    std::cin >> n;

    // 动态分配内存
    int* arr = new int[n];

    std::cout << "Enter the elements: ";
    for (int i = 0; i < n; ++i) {
        std::cin >> arr[i];
    }

    // 使用动态分配的内存
    std::cout << "The elements are: ";
    for (int i = 0; i < n; ++i) {
        std::cout << arr[i] << " ";
    }
    std::cout << std::endl;

    // 释放动态分配的内存
    delete[] arr;

    return 0;
}