There are four ways to create dynamic arrays in C: using std::vector. Use new and delete. Use template metaprogramming. Use boost library.
How to create a dynamic array in C
Dynamic array, also known as variable array or vector, is a A data structure whose size can be changed at runtime. In C, you can create dynamic arrays using the following methods:
1. Use the built-in std::vector
#include <vector> int main() { // 创建一个整型动态数组,初始大小为 0 std::vector<int> numbers; // 向数组中添加元素 numbers.push_back(1); numbers.push_back(2); numbers.push_back(3); // 输出动态数组中的元素 for (int number : numbers) { std::cout << number << " "; } return 0; }
2. Use new and delete
int* numbers = new int[size]; // 操作动态数组 delete[] numbers;
3. Use template metaprogramming
template <typename T, size_t Size> struct Array { T data[Size]; }; int main() { // 创建一个大小为 3 的整型动态数组 Array<int, 3> numbers; // 操作动态数组 return 0; }
4. Use boost library
#include <boost/array.hpp> int main() { // 创建一个大小为 3 的整型动态数组 boost::array<int, 3> numbers; // 操作动态数组 return 0; }
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