Question

我正在上课，在完成任务之前，我有最后一部分作业。我得到了一个我不允许编辑的C ++文件，我正在编写.asm文件。我在项目中的最后一个障碍是： 1.当给定2个常规值时，我的_Divide函数应该访问枚举，但我不知道如何调用它而不是意外地击中_PrintResult。 2.除以0时，我可以显示“除以零显示”，但不能显示“尝试除零”。

这是.cpp：包括

using namespace std;

enum ResultCode { ShowSquare, ShowMultiply, ShowDivide, ShowRemainder,
ShowDivideFailure };
enum SuccessCode { Failure, Success };

extern "C" SuccessCode Divide(long, long, long &, long &);
extern "C" long Multiply(long, long);
extern "C" void PrintResult(ResultCode, long);
extern "C" long Square(long);

void main()
{
long Num1;
long Num2;
long Result;
long Remainder;
do
{
    cout << "Enter Number to Square" << endl;
    cin >> Num1;
    Result = Square(Num1);
    cout << "Square is: " << Result << endl;
    cout << "Enter two numbers to multiply" << endl;
    cin >> Num1 >> Num2;
    Result = Multiply(Num1, Num2);
    cout << "Result of multiply is: " << Result << endl;
    cout << "Enter mumber to divide into then number to divide by" << endl;
    cin >> Num1 >> Num2;
    if (Divide(Num1, Num2, Result, Remainder) == Success)
        cout << "Result is " << Result << " and remainder is " << Remainder 
<< endl;
    else
        cout << "Attempted division by zero, ";
} while (Result > 0);
}

void PrintResult(ResultCode PrintCode, long Value)
{
switch (PrintCode)
{
case ShowSquare:
    cout << "Display of square is: " << Value << endl;
    break;
case ShowMultiply:
    cout << "Display of multiply is: " << Value << endl;
    break;
case ShowDivide:
    cout << "Display of divide is " << Value << endl;
    break;
case ShowRemainder:
    cout << "Display of remainder is " << Value << endl;
    break;
case ShowDivideFailure:
    cout << "Display of Division by zero" << endl;
    break;
default:
    cout << "Error in assembly routines" << endl;
}
}

这是我到目前为止所做的：

.386

.model flat

.code

public    _Square
public    _Multiply
public    _Divide
extern    _PrintResult:proc


ShowSquare = 0
ShowMultiply = 1
ShowDivideFailure = 4

Failure = 0
Success = 1

_Square        proc
            mov     eax, [esp + 4]
            imul    eax, eax
        push    eax

        push    eax
        push    0
        call    _PrintResult
        add     esp, 8

        pop     eax
        ret
_Square        endp

_Multiply    proc
        mov         eax, [esp + 8]
        mov         ebx, [esp + 4]
        imul        eax, ebx
        push        eax

        push        eax
        push        1
        call        _PrintResult

        add        esp, 12
        mov        eax, [esp + 8]
        mov        ebx, [esp + 4]
        imul    eax, ebx

        ret
_Multiply    endp


_Divide        proc

Start1:
mov            eax, [esp+4]
mov            ebx, [esp+8]

cmp            ebx,0
je            Failure1

cdq
idiv        ebx
mov            ebx, edx
jmp            Success1

Success1:

push        eax
push        eax
push        2
call        _PrintResult
add            esp, 8
pop            eax

push        ebx
push        ebx
push        3
call        _PrintResult
add            esp, 8
pop            ebx

push        eax
push        eax
push        0
call        _SuccessCode

Failure1:

        ret
_Divide        endp


end

如何在asm文件中调用枚举？

0 个答案: