The C language function returns a two-bit array function parameter as a two-dimensional array

The typedef can be implemented simply. You can also write directly.

A simple example of a function that wrote two simple matrix operations.

#include <stdio.h> #include <stdlib.h>const int ROW = 3;const int COL = 4;typedef int (* mat_pointer) [col];mat_  Pointer Init_mat (Mat_pointer a) {for    (int i = 0; i < ROW, ++i) for        (int j = 0; j < COL; ++j)            a[i][j] = i + J;    return A;} void Print_mat (Mat_pointer a) {for    (int i = 0; i < ROW, ++i) for        (int j = 0; j < COL; ++j)            printf ("a[%d] [%d]=%d%c, I, J, a[i][j], j = = COL-1? ' \ n ': ' \ t ');    printf ("\ n");} int (*build_mat (void)) [col]{    Int (* arr_pointer) [col] = (int (*) [col]) malloc (ROW * COL * sizeof (int));    for (int i = 0, i < ROW; ++i) {for        (int j = 0; j < COL; ++j)            Arr_pointer[i][j] = i * + j;    }    return arr_pointer;} int main (void) {    int arr[row][col];    Mat_pointer arr2 = Init_mat (arr);    Print_mat (ARR2);    int (*ARR3) [COL] = Build_mat ();    Print_mat (ARR3);    return 0;}

　　

The

C language function returns a two-bit array function parameter as a two-dimensional array