Pointer passing for a multidimensional array of C languages

In C language, to save space, improve the speed of running often use pointers to complete the transfer of the array.

For a one-dimensional array, you can pass the first address directly

For a two-dimensional array, it must be declared as a pointer to a two-dimensional array at the time of delivery, and it will be called with some arithmetic

The first is to define the formal parameters:

function name (int *arg)

To pass an argument to this parameter:

Function name (&data[0][0])

Take out a number of J columns in row I (Total n columns)

* (ARG+N*I+J)

Pointer passing for a multidimensional array of C languages