Question

Using assembly language print a string backward ,going across and going down.

Answer 1

Try this:
INCLUDE Irvine32.inc

.data
buffer byte 20 DUP(0)
byteCount DWORD ?
nameSize  DWORD ?

Question  byte  "Please enter your name."  ,0
Greeting byte   "Hello " ,0
Statement byte " Here is your name backwards"

.code
main proc

    mov edx , OFFSET Question
    call WriteString
    call CRLF
    Call CRLF

    mov edx, OFFSET buffer
    mov Ecx, SIZEOF buffer
    call ReadString
    mov nameSize, eax

    push edx
    mov EDX ,OFFSET greeting
    Call WriteString
    pop edx
    call WriteString
    Call CRLF
    Call CRLF

    mov  ecx,nameSize
    mov  esi,0

L1: movzx eax,buffer[esi]    ; get character
    push eax                ; push on stack
    inc  esi
    loop L1

    ; Pop the name from the stack in reverse
    ; and store it in the aName array.

    mov  ecx,nameSize
    mov  esi,0

L2: pop  eax                ; get character
    mov  buffer[esi],al      ; store in string
    inc  esi
    loop L2


    mov EDX ,OFFSET buffer
    call WriteString         ; Write the reversed string that is now in buffer

    exit
main ENDP
END