C++的原生数组你了解多少

int a[10]{};

int a []{1, 2, ,3};//编译器会自动将a声明为一个有3个元素的数组

	int studentId[]{101, 102, 103, 104, 105, 106};
	//数组遍历
	for (int i = 0; i < sizeof(studentId) / sizeof(int); i++)
		std::cout << studentId[i] << std::endl;

	for (int i : studentId)
		std::cout << i << std::endl; //i 不再是索引，而是数组内的元素；

	for (auto i : studentId)
		std::cout << i << std::endl; //i 不再是索引，而是数组内的元素；

int studentId[3][5]{};

int studentId[3][5]
{
    {101, 102, 103, 104,  105, 106},
    {201, 202, 203, 204,  205, 206},
    {301, 302, 303, 304,  305, 306}
};

	int studentId[3][5]{
		{1, 2, 3, 4, 5},
	    {11, 12, 13, 14, 15},
	    {21, 22, 23, 24, 25}
	};
	for (int x = 0; x < 3; x++)
	{
		int count{};
		for (int y: studentId[x])
		{
			count++;
			std::cout << x + 1 << "班第" << count << "个同学的学号是" << y << std::endl;
		}
	}