Matrix in assembly mxn dimension in emu 8086

[zemzela]

I made a code in assembly 8086. I load matrix (array) in memory with dimension 3x3. but this code works just for this dimension of matrix 3x3. Could someone give me an idea how could i make it to work with dimension m x n? the array is loaded in memory and at the end just print the result, another array. thanks

; multi-segment executable file template.

data segment
matrix db 1, 2, 3, 4, 5, 6, 7, 8, 9 ; load matrix in memory

ends

stack segment
dw 128 dup(0)
ends

code segment
start:
; set segment registers:
mov ax, data
mov ds, ax
mov es, ax



mov bx, matrix ; move matrix to offset bx
mov ch, 3
mov cl, 0


COLUMNAHEAD: 

mov dl, [bx] ; get the first element of matrix in dl
add dl, 30h ; add to show number
mov ah, 02h
int 21h ; print first number
inc cl 

cmp cl, ch ; compare if the counter is at the end of column


jge ROWAHEAD ; if greater go to row
add bx, 3 ; if not inc offset for 3 
jmp COLUMNAHEAD





ROWAHEAD:
inc cl ; 1 element of roe
inc bx ; inc offset for one place
mov dl, [bx] ; get the number in dl
add dl, 30h ; convert to number
mov ah, 02h
int 21h ; print the number

cmp cl, 5 
je COLUMNAHEAD
jne ROWAHEAD 


COLUMNBACK:
inc cl 
sub bx, 3
mov dl, [bx]
add dl, 30h
mov ah, 02h
int 21h 
cmp cl, 7
jne COLUMNBACK 
je ROWBACK

ROWBACK:
dec bx 
mov dl, [bx] 
add dl, 30h
mov ah, 02h
int 21h 
JMP MIDDLE


MIDDLE:
add bx, 3
mov dl, [bx] 
add dl, 30h
mov ah, 02h
int 21h 

JMP END

END: 


this is the code i wrote. it works for the matrix 
1, 2, 3,
4, 5, 6, 
7, 8, 9 and print 1, 4, 7, 8, 9, 6, 3, 2, 5

 

[Adak]

Can't help you in assembly, but I'm curious why you don't write this in C?

 

[zemzela]

I don't know C, I know C++, If you know C++, you may help me how to write this in C++, and I would translate in assembly. Thanks

 

[Adak]

If you know C++, then this C code should be easy to understand. I don't know C++.

#include <stdio.h>
#include <stdlib.h>

int main(void)  {
	
   int **mat; // Pointer to pointer
   int rows, cols, i, j;
   printf("How many rows you want ");
   scanf("%d", &rows);
   //rows = 10;
   //cols = 10;
   mat = malloc(rows*sizeof(int*));       // array of number of rows


   printf("How many cols ");
   scanf("%d", &cols);
   for (i=0; i<rows; i++) {                // for each row ...
      mat[i] = malloc(cols * sizeof(int)); // add these many cols
   }
   for (i = 0; i<rows; i++) {
      for (j = 0; j<cols; j++) {
         mat[i][j] = (i+1) * (j+1);                
         printf("%4d ", mat[i][j]);        //these two print lines
         //printf("%4d ", *(*(mat+i)+j));  //do the same thing
      }
      putchar('\n');
   }
   for(i=0;i<rows;i++)                     //free malloc'd memory
      free(mat[i]);                        //rows first
   free(mat);                              //then the array pointer itself

   printf("\n\n"); 
      return 0;
}