Friday, August 5, 2011

TASM Program to find the Sum of N numbers


 
The Program given below receives N numbers from console,computes the sum of those numbers and prints the result.
 print macro msg  
   mov ah,09h  
   mov dx,offset msg  
   int 21h  
 endm  
 readnum macro num  
   mov ah,01h  
   int 21h  
   sub al,'0'  
   mov bh,0ah  
   mul bh  
   mov num,al  
   mov ah,01h  
   int 21h  
   sub al,'0'  
   add num,al  
 endm  
 data segment  
   cr equ 0dh  
   lf equ 0ah  
   msg1 db 'Enter the limit:','$'  
   msg3 db cr,lf,'Enter the no:','$'  
   msg2 db cr,lf,'sum=','$'  
   lmt db ?  
   temp db ?  
   arr db 15 dup(0)  
   rslt db 2 dup(0)  
 data ends  
 code segment  
   assume cs:code,ds:data  
  start:mov ax,data  
      mov ds,ax  
      print msg1  
      readnum lmt  
      mov ch,00h  
      mov cl,lmt  
      mov si,00h  
   l1:print msg3  
      readnum temp  
      mov al,temp  
      mov arr[si],al  
      inc si  
      loop l1  
      mov ch,00h  
      mov cl,lmt  
      mov bx,00h  
      mov si,00h  
      mov ax,0000h  
   l2: mov bh,00h  
      mov bl,arr[si]  
      add ax,bx  
      mov rslt,al  
      inc si  
      loop l2  
      mov si,offset rslt   
      call hexa2asc  
      print msg2  
      print rslt  
      mov ah,4ch  
      mov al,00h  
      int 21h  
  hexa2asc proc near  
     push ax  
     push bx  
     push cx  
     push dx  
     push si  
     mov cx,00h  
     mov bx,0ah  
 rpt1:  mov dx,00h  
     div bx  
     add dl,'0'  
     push dx  
     inc cx  
     cmp ax,0ah  
     jge rpt1  
     add al,'0'  
     mov [si],al  
 rpt2:  
     pop ax  
     inc si  
     mov [si],al  
     loop rpt2  
     inc si  
     mov al,'$'  
     mov [si],al  
     pop si  
     pop dx  
     pop cx  
     pop bx  
     pop ax  
     ret  
  hexa2asc endp  
  code ends  
 end start  

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