用"new"创建2D数组？

Question

我想创建一个如下所示的2D数组.

char **dog = new char[480][640];

但它错误:

error C2440: 'initializing' : cannot convert from 'char (*)[640]' to 'char ** '
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

使用"新"我需要做什么？(不使用calloc,malloc或char dog[480][640];)

Answer 1

像这样的东西:

char **dog = new char *[480];
for (int i = 0; i < 480; i++)
    dog[i] = new char[640];

删除时也一样,但先循环.

Answer 2

如果你想从堆中获取内存，可以这样使用：

// declaration
char *dog = new char[640*480];

// usage
dog[first_index * 640 + second_index] = 'a';

// deletion
delete[] dog;