静态多维数组（C / C ++）

Question

Is memory allocated for multidimensional arrays in C or C++ always contiguous, or is the storage dependent on the compiler? If it is guaranteed to be contiguous is there a standard on it somewhere for reference? For example

int x[2][2] = { { 1 , 2 } , { 5 , 10 } } ;

Are the integers 1, 2, 5, 10 in sequence in memory ?

Answer 1

Arrays are guaranteed contiguous. What we have here is an array of arrays - each layer of which is contiguous. The inner most arrays we know must be {1, 2} and {5, 10} , and the outer most array must also be contiguous. Therefore, {{1,2},{5,10}} must be 1, 2, 5, 10 sequentially in memory.

Answer 2

Yes. Arrays are always allocated in contiguous memory location. It doesn't matter whether its a single or multi dimensional array.