0
我正在編寫一個程序，該程序的行爲被設計爲來自用戶的單個文本輸入的功能，而不是其他任何東西。沒有使用系統時鐘，沒有引用外部文件，沒有多線程。然而，當我運行程序時，程序執行時的控制流程與調試時不同，我認爲在這種情況下應該是不可能的。運行和調試之間的不同控制流程
它不會自行編譯，但這裏是工作不正常功能：
static public Dictionary<ComplexNumber, int> getFactorization(ComplexNumber xGaussian)
{
Dictionary<ComplexNumber, int> factors = new Dictionary<ComplexNumber, int>();
int sumOfRealAndImaginary = 2;
while (true)
{
Console.WriteLine(sumOfRealAndImaginary);//test
int realPart = sumOfRealAndImaginary/2;
int imaginaryPart = sumOfRealAndImaginary - realPart;
for (int i = 0; realPart - i >= 0;)
{
if ((realPart - i) * (realPart - i) +
(imaginaryPart + i) * (imaginaryPart + i) >
xGaussian.getRealPart().getNumerator() *
xGaussian.getRealPart().getNumerator() +
xGaussian.getImaginaryPart().getNumerator() *
xGaussian.getImaginaryPart().getNumerator())
{
if (factors.ContainsKey(xGaussian))
factors[xGaussian] += 1;
else
factors.Add(xGaussian, 1);
return factors;
}
ComplexNumber factor =
new ComplexNumber(realPart - i, imaginaryPart + i);
ComplexNumber quotient = (ComplexNumber)(xGaussian/factor);
quotient.getRealPart().reduce();
quotient.getImaginaryPart().reduce();
if (quotient.getRealPart().getDenominator() == 1 &&
quotient.getImaginaryPart().getDenominator() == 1)
{
if (factors.ContainsKey(factor))
factors[factor] += 1;
else
factors.Add(factor, 1);
xGaussian = (ComplexNumber)(xGaussian/factor);
continue;
}
factor = new ComplexNumber(realPart - i, -imaginaryPart - i);
quotient = (ComplexNumber)(xGaussian/factor);
quotient.getRealPart().reduce();
quotient.getImaginaryPart().reduce();
if (quotient.getRealPart().getDenominator() == 1 &&
quotient.getImaginaryPart().getDenominator() == 1)
{
if (factors.ContainsKey(factor))
factors[factor] += 1;
else
factors.Add(factor, 1);
xGaussian = (ComplexNumber)(xGaussian/factor);
continue;
}
++i;
}
++sumOfRealAndImaginary;
}
}
的ComplexNumber類型的設計的行爲方式複數數學做，但只限於土地及假想的部分是合理的，所以我將以與我在數學中的複數相同的方式鍵入ComplexNumber對象的值。爲了簡單起見，此版本的getFactorization（）假定兩個部分的分母均爲1。
注意sumOfRealAndImaginary是如何初始化爲2的，唯一改變的地方是它在while循環底部遞增的地方。在調試模式下，當我傳遞getFactorization（）值爲3 + 4i並以足夠中等的速度遍歷代碼時，它會在sumOfRealAndImaginary = 3時返回。這就是我所期望的。但是，當我運行程序時，也使用3 + 4i作爲函數參數，直到sumOfRealAndImaginary = 126纔會返回，如從while循環頂部的WriteLine（）調用中可以看到的那樣。特別是，while循環中的第一個if語句（其代碼塊包含函數的return語句）在運行時比調試時需要更多的傳遞來計算true。不僅對於預期的sumOfRealAndImaginary值爲3，而且對於大於該值的每個值，它都應評估爲真。另外，當我在調試模式下足夠快地通過代碼時，如果語句保持評估爲false，直到我放慢速度，此時它在下一次傳遞時評估爲true。所以看起來，if語句是否正確評估取決於代碼執行的速度。什麼會導致這種行爲？
我可以列舉出更多不同的意外行爲，但也許這足以啓動。
編輯：ComplexNumber類，按照PawełŁukasik的要求。分數是一個類似的類，它也是從Number類派生的，它是抽象的。
public class ComplexNumber : Number
{
Fraction m_real;
Fraction m_imaginary;
public ComplexNumber(Fraction real, Fraction imaginary)
{
m_real = real;
m_imaginary = imaginary;
}
public ComplexNumber(int real, int imaginary)
{
m_real = new Fraction(real, 1);
m_imaginary = new Fraction(imaginary, 1);
}
public Fraction getRealPart()
{
return m_real;
}
public Fraction getImaginaryPart()
{
return m_imaginary;
}
protected override Number add(Number number)
{
if (number is Fraction)
{
Fraction fraction = (Fraction)number;
return new ComplexNumber((Fraction)(m_real + fraction), m_imaginary);
}
ComplexNumber complexNumber = (ComplexNumber)number;
return new ComplexNumber((Fraction)(m_real + complexNumber.m_real),
(Fraction)(m_imaginary + complexNumber.m_imaginary));
}
protected override Number subtract(Number number)
{
if (number is Fraction)
{
Fraction fraction = (Fraction)number;
return new ComplexNumber((Fraction)(m_real - fraction), m_imaginary);
}
ComplexNumber complexNumber = (ComplexNumber)number;
return new ComplexNumber((Fraction)(m_real - complexNumber.m_real),
(Fraction)(m_imaginary - complexNumber.m_imaginary));
}
protected override Number multiply(Number number)
{
if (number is Fraction)
{
Fraction fraction = (Fraction)number;
return new ComplexNumber((Fraction)(m_real * fraction),
(Fraction)(m_imaginary * fraction));
}
ComplexNumber complexNumber = (ComplexNumber)number;
return new ComplexNumber((Fraction)(m_real * complexNumber.m_real - m_imaginary *
complexNumber.m_imaginary), (Fraction)(m_real * complexNumber.m_imaginary +
m_imaginary * complexNumber.m_real));
}
protected override Number multiply(int scalar)
{
return new ComplexNumber((Fraction)(m_real * scalar),
(Fraction)(m_imaginary * scalar));
}
protected override Number divide(Number number)
{
if (number is Fraction)
{
Fraction fraction = (Fraction)number;
return new ComplexNumber((Fraction)(m_real/fraction),
(Fraction)(m_imaginary/fraction));
}
ComplexNumber complexNumber = (ComplexNumber)number;
return new ComplexNumber((Fraction)((Fraction)(m_real * complexNumber.m_real +
m_imaginary * complexNumber.m_imaginary)/(Fraction)(complexNumber.m_real *
complexNumber.m_real + complexNumber.m_imaginary * complexNumber.m_imaginary)),
(Fraction)((Fraction)(m_imaginary * complexNumber.m_real -
m_real * complexNumber.m_imaginary)/(Fraction)(complexNumber.m_real
* complexNumber.m_real + complexNumber.m_imaginary * complexNumber.m_imaginary)));
}
public override string ToString()
{
StringBuilder output = new StringBuilder();
if (m_imaginary.getNumerator() != 0)
{
m_imaginary.reduce();
if (m_imaginary.getNumerator() > 0)
{
if (m_real.getNumerator() != 0)
{
output.Append(m_real.ToString());
output.Append("+");
}
if (m_imaginary.getNumerator() != 1)
output.Append(m_imaginary.getNumerator());
}
else if (m_imaginary.getNumerator() < 0)
{
if (m_real.getNumerator() != 0)
output.Append(m_real.ToString());
output.Append("-");
if (m_imaginary.getNumerator() != -1)
output.Append(-m_imaginary.getNumerator());
}
output.Append("i");
if (m_imaginary.getDenominator()!=1)
{
output.Append("/");
output.Append(m_imaginary.getDenominator());
}
}
else if (m_real.getNumerator() != 0)
output.Append(m_real.ToString());
else
return "0";
return output.ToString();
}
public override bool Equals(object obj)
{
if (obj is ComplexNumber)
{
ComplexNumber complexNumber = (ComplexNumber)obj;
return m_real.Equals(complexNumber.m_real) &&
m_imaginary.Equals(complexNumber.m_imaginary);
}
return false;
}
public override int GetHashCode()
{
return m_real.GetHashCode() | m_imaginary.GetHashCode();
}
}
再次編輯：a link to a text file of the whole program，就此而言。
發佈您的ComplexNumber類 –
heisenbug提出了一種競爭條件，或者說您的調試器正在評估具有副作用的表達式。你做*任何*異步，線程，後臺任務等？ – Amy
@Amy如果我有任何這些東西，我已經設法使用它們而沒有意識到它。有沒有一種巧妙的方式將這些東西引入到一個程序中，例如，它不涉及顯式使用async關鍵字或創建一個Thread對象？我沒有創建的唯一命名空間是System，System.Collections.Generic和System.Text。 –