2-30.asm

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.386
.model flat, stdcall
option casemap:none
include kernel32.inc
includelib kernel32.lib
.data
buf db 'I co&me from Chi&na ',0
.code
start:
        xor edx, edx
        xor ecx, ecx
        mov eax, offset buf
loop1: mov cl, [eax]
       cmp cl, 0
       je exit
       inc eax
       cmp cl, '&'
       jne loop1
       mov edx, eax
       dec edx
loop2: mov cl, [eax]
       mov[eax-1], cl
       inc eax
       cmp cl, 0
       jne loop2
loop3: mov eax, edx
       jmp loop1
exit:
       invoke ExitProcess,0
end start