Wed, 25 Dec 2019 13:26:11 +0800

2.1.asm

@@ -0,0 +1,85 @@
+.686p
+.model flat
+include kernel32.inc
+includelib kernel32.lib
+includelib msvcrt.lib
+extern _printf:proc
+extern _scanf:proc
+extern _strlen:proc
+.data
+strbuf db 1000 dup(0)
+strfmt db "%s",0
+.code
+process_char proc
+    mov eax, [esp+4]
+    cmp eax, 65
+    jl check_if_lower
+    cmp eax, 90
+    jg check_if_lower
+    jmp uppercase
+check_if_lower:
+    cmp eax, 97
+    jl end_of_proc
+    cmp eax, 122
+    jg end_of_proc
+    
+lowercase:
+    sub eax, 84
+    cdq
+    mov ebx, 26
+    idiv ebx
+    add edx, 97
+    mov al, dl
+    jmp end_of_proc
+    
+uppercase:
+    sub eax, 52
+    cdq
+    mov ebx, 26
+    idiv ebx
+    add edx, 65
+    mov al, dl
+    
+end_of_proc:
+    ret
+
+process_char endp
+_main proc
+    push ebp
+    mov ebp, esp
+
+    push offset strbuf
+    push offset strfmt
+    call _scanf
+    add esp, 8
+    
+    push offset strbuf
+    call _strlen
+    add esp, 4
+    
+    mov ecx, eax
+    test ecx, ecx
+    jz for@end
+for@start:
+    dec ecx
+    
+    movzx eax, byte ptr strbuf[ecx]
+    push eax
+    call process_char
+    add esp, 4
+    
+    mov byte ptr strbuf[ecx], al
+    
+    test ecx, ecx
+    jnz for@start
+for@end:
+    push offset strbuf
+    push offset strfmt
+    call _printf
+    add esp, 8
+    push 0
+    call ExitProcess
+    leave
+    ret
+_main endp
+end _main

2.2.asm

@@ -0,0 +1,86 @@
+.686p
+.model flat
+include kernel32.inc
+includelib kernel32.lib
+includelib msvcrt.lib
+extern _printf:proc
+extern _scanf:proc
+extern _strlen:proc
+_BSS SEGMENT
+a dd 100000 dup(?)
+_BSS ENDS
+.data
+strScanfFmt db "%d",0
+strPrintfFmt db "%d ",0
+.code
+_main proc
+n=-4
+sub esp, 4
+
+lea edx, dword ptr n[ebp]
+push edx
+push offset strScanfFmt
+call _scanf
+add esp, 8
+
+mov ecx, dword ptr n[ebp]
+xor ebx, ebx
+loop1@start:
+cmp ebx, ecx
+je loop1@end
+push ecx
+lea edx, dword ptr a[ebx*4]
+push edx
+push offset strScanfFmt
+call _scanf
+add esp, 8
+pop ecx
+inc ebx
+jmp loop1@start
+loop1@end:
+
+
+xor ebx, ebx
+loop2@start:
+cmp ebx, ecx
+je loop2@end
+mov esi, ebx
+mov edi, esi
+
+loop2_1@start:
+cmp edi, ecx
+je loop2_1@end
+mov edx, dword ptr a[edi*4]
+cmp edx, dword ptr a[esi*4]
+cmovl esi, edi
+inc edi
+jmp loop2_1@start
+loop2_1@end:
+
+mov edx, dword ptr a[ebx*4]
+mov edi, dword ptr a[esi*4]
+mov dword ptr a[ebx*4], edi
+mov dword ptr a[esi*4], edx
+
+inc ebx
+jmp loop2@start
+loop2@end:
+
+xor ebx, ebx
+loop3@start:
+cmp ebx, ecx
+je loop3@end
+push ecx
+push dword ptr a[ebx*4]
+push offset strPrintfFmt
+call _printf
+add esp, 8
+pop ecx
+inc ebx
+jmp loop3@start
+loop3@end:
+
+push 0
+call ExitProcess
+_main endp
+end _main