lab7task2

.686
.model flat, c

includelib libcmt.lib
includelib libvcruntime.lib
includelib libucrt.lib
includelib legacy_stdio_definitions.lib

extern printf_s: proc, scanf_s: proc

.data
enterBaseNumber byte "Enter base number: ", 0
enterExponent byte "Enter the exponent(positive integer): ", 0
inputFormatString byte "%d", 0
outputformatString byte "%d^%d = %d", 13, 10, 0

.data?
x dword ?
y dword ?
result dword ?

.code
main proc

        push        offset enterBaseNumber
        call        printf_s
        add         esp, 4

        push        offset x
        push        offset inputFormatString
        call        scanf_s
        add         esp, 8

        push        offset enterExponent
        call        printf_s
        add         esp, 4

        push        offset y
        push        offset inputFormatString
        call        scanf_s
        add         esp, 8

        push        y
        push        x
        call        power
        add         esp, 8

        mov         result, eax

        push        result
        push        y
        push        x
        push        offset outputformatString
        call        printf_s
        add         esp, 16

        xor         eax, eax

        ret
main endp

power PROC

        push        ebp
        mov         ebp,  esp
        sub         esp,  32
        cmp         dword ptr [ebp + 12], 0    ; y
        mov         esi, [ebp + 12]
        jne         L1                        ; [ebp + 12]  x
        mov         eax, 1
        jmp         L2
L1:
        ;mov            eax, [ebp + 8]
        mov         edi, [ebp + 8]
        mov         ebx, [ebp + 12]              ; return x * power(x, y - 1);
        dec         ebx
        push        ebx
        push        edi
        call        power
        add         esp, 8
        mul         dword ptr [ebp + 8]
L2:
        mov         esp, ebp
        pop         ebp
        ret
power ENDP
end