private static void TestSubtraction()
{
Console.WriteLine("Testing BigInt subtraction: 9687 - "
+ "4999");
int testSmallInt1 = 9687, testSmallInt2 = 4999;
BigInt big1 = new BigInt(testSmallInt1.ToString());
BigInt big2 = new BigInt(testSmallInt2.ToString());
BigInt diff = big1 - big2;
if (Convert.ToInt32(diff.AbsValue) == testSmallInt1 - testSmallInt2)
{
Console.WriteLine("Subtraction successful. Diff was: " + diff.AbsValue);
}
else
{
Console.WriteLine("Subtraction unsuccessful. Diff was: " + diff.AbsValue + Environment.NewLine + "Expected Diff was:" + diff);
}
Console.ReadLine();
Console.WriteLine("Testing BigInt subtraction: 4999 - "
+ "9687");
diff = big2 - big1;
if (Convert.ToInt32(diff.ToString()) == testSmallInt2 - testSmallInt1)
{
Console.WriteLine("Subtraction successful. Diff was: " + diff.ToString());
}
else
{
Console.WriteLine("Subtraction unsuccessful. Diff was: " + diff.ToString() + Environment.NewLine + "Expected Diff was:" + (testSmallInt2 - testSmallInt1).ToString());
}
Console.WriteLine("Testing BigInt subtraction: -9687 - 4999");
testSmallInt1 = -9687; testSmallInt2 = 4999;
big1 = new BigInt(testSmallInt1.ToString());
big2 = new BigInt(testSmallInt2.ToString());
diff = big1 - big2;
if (Convert.ToInt32(diff.ToString()) == testSmallInt1 - testSmallInt2)
{
Console.WriteLine("Subtraction successful. Diff was: " + diff.ToString());
}
else
{
Console.WriteLine("Subtraction unsuccessful. Diff was: " + diff.ToString() + Environment.NewLine + "Expected Diff was:" + (testSmallInt1 - testSmallInt2).ToString());
}
Console.ReadLine();
Console.WriteLine("Testing BigInt Subtraction: 1234567789798797897998798797987987"
+ "1111110000000000000000000000000000");
big1 = new BigInt("1234567789798797897998798797987987");
big2 = new BigInt("1111110000000000000000000000000000");
diff = big1 - big2;
if (diff.AbsValue == "123457789798797897998798797987987")
{
Console.WriteLine("Subtraction successful. Sum was: " + diff.AbsValue);
}
else
{
Console.WriteLine("Subtraction unsuccessful. Sum was: " + diff.AbsValue);
}
Console.WriteLine("Testing BigInt Subtraction: 10000000"
+ "9");
big1 = new BigInt("10000000");
big2 = new BigInt("9");
testSmallInt1 = 10000000; testSmallInt2 = 9;
diff = big1 - big2;
if (Convert.ToInt32(diff.ToString()) == testSmallInt1 - testSmallInt2)
{
Console.WriteLine("Subtraction successful. Diff was: " + diff.ToString());
}
else
{
Console.WriteLine("Subtraction unsuccessful. Diff was: " + diff.ToString() + Environment.NewLine + "Expected Diff was:" + (testSmallInt2 - testSmallInt1).ToString());
}
Console.ReadLine();
}
private static void TestSpecialCases()
{
BigInt big1 = null, big2 = null;
int testSmallInt1 = 9687, testSmallInt2 = 4999;
//Test simple cases
Console.WriteLine("Testing BigInt Multiplication 9687*0");
testSmallInt1 = 9687; testSmallInt2 = 0;
big1 = new BigInt(testSmallInt1.ToString());
big2 = new BigInt(testSmallInt2.ToString());
BigInt product = big1 * big2;
if (product.ToString() == (testSmallInt1 * testSmallInt2).ToString())
{
Console.WriteLine("Multiplication == successful");
}
else
{
Console.WriteLine("Multiplication == unsuccessful. Expected: " + (testSmallInt1 * testSmallInt2).ToString() + " Received: " + product.ToString());
}
Console.ReadLine();
//Test simple cases
Console.WriteLine("Testing BigInt Multiplication 9687*1");
testSmallInt1 = 9687; testSmallInt2 = 1;
big1 = new BigInt(testSmallInt1.ToString());
big2 = new BigInt(testSmallInt2.ToString());
product = big1 * big2;
if (product.ToString() == (testSmallInt1 * testSmallInt2).ToString())
{
Console.WriteLine("Multiplication == successful");
}
else
{
Console.WriteLine("Multiplication == unsuccessful. Expected: " + (testSmallInt1 * testSmallInt2).ToString() + " Received: " + product.ToString());
}
Console.ReadLine();
//Test simple cases
Console.WriteLine("Testing BigInt Multiplication 9687*-1");
testSmallInt1 = 9687; testSmallInt2 = -1;
big1 = new BigInt(testSmallInt1.ToString());
big2 = new BigInt(testSmallInt2.ToString());
product = big1 * big2;
if (product.ToString() == (testSmallInt1 * testSmallInt2).ToString())
{
Console.WriteLine("Multiplication == successful");
}
else
{
Console.WriteLine("Multiplication == unsuccessful. Expected: " + (testSmallInt1 * testSmallInt2).ToString() + " Received: " + product.ToString());
}
Console.ReadLine();
//Multiplication by powers of 10
Console.WriteLine("Testing BigInt Multiplication 9687*1000000000000");
testSmallInt1 = 9687; testSmallInt2 = -1;
big1 = new BigInt(testSmallInt1.ToString());
big2 = new BigInt("1000000000000");
product = big1 * big2;
if (product.ToString() == "9687000000000000")
{
Console.WriteLine("Multiplication == successful");
}
else
{
Console.WriteLine("Multiplication == unsuccessful. Expected: " + (testSmallInt1 * testSmallInt2).ToString() + " Received: " + product.ToString());
}
Console.ReadLine();
}
