public void SubtractBigDecimal()
{
BigDecimal sub1 = BigDecimal.Parse("13948");
BigDecimal sub2 = BigDecimal.Parse("2839.489");
BigDecimal result = BigMath.Subtract(sub1, sub2);
Assert.True(result.ToString().Equals("11108.511") && result.Scale == 3, "13948 - 2839.489 is wrong: " + result);
BigDecimal result2 = BigMath.Subtract(sub2, sub1);
Assert.True(result2.ToString().Equals("-11108.511") && result2.Scale == 3, "2839.489 - 13948 is wrong");
Assert.True(result.Equals(-result2), "13948 - 2839.489 is not the negative of 2839.489 - 13948");
sub1 = new BigDecimal(value, 1);
sub2 = BigDecimal.Parse("0");
result = BigMath.Subtract(sub1, sub2);
Assert.True(result.Equals(sub1), "1234590.8 - 0 is wrong");
sub1 = new BigDecimal(1.234E-03);
sub2 = new BigDecimal(3.423E-10);
result = BigMath.Subtract(sub1, sub2);
Assert.True(result.ToDouble() == 0.0012339996577, "1.234E-03 - 3.423E-10 is wrong, " + result.ToDouble());
sub1 = new BigDecimal(1234.0123);
sub2 = new BigDecimal(1234.0123000);
result = BigMath.Subtract(sub1, sub2);
Assert.True(result.ToDouble() == 0.0, "1234.0123 - 1234.0123000 is wrong, " + result.ToDouble());
}
public static BigInteger operator -(BigInteger a, BigInteger b)
{
return(BigMath.Subtract(a, b));
}