Multidimensional Arrays and pointer in C language

char** argv == char* argv[]

in int main(int argc, char* argv[])

e,g:   

int (* pz)[2]; //a pointer(pz) points to an array of 2 ints.

int * pax[2]; // 2 pointers

dynamic multi-dimensional arrays in C

func(int x, int y, int a[x][y])
	{
	...
	}

where the array dimensions are specified by other parameters to the function? Unfortunately, in C, you cannot. (You can do so in FORTRAN, and you can do so in the extended language implemented by gcc, and you will be able to do so in the new version of the C Standard (``C9X'') to be completed in 1999, but you cannot do so in standard, portable C, today.)

Finally, we might explicitly note that if we pass a multidimensional array to a function:

	int a2[5][7];
	func(a2);

 ------

Dynamically Allocating Multidimensional Arrays

    #include <stdlib.h>

    int **array;
    array = malloc(nrows * sizeof(int *));
    if(array == NULL)
        {
        fprintf(stderr, "out of memory\n");
        exit or return
        }
    for(i = 0; i < nrows; i++)
        {
        array[i] = malloc(ncolumns * sizeof(int));
        if(array[i] == NULL)
            {
            fprintf(stderr, "out of memory\n");
            exit or return
            }
        }

for(i = 0; i < nrows; i++)
        free(array[i]);
    free(array);