# V3227. The precedence of the arithmetic operator is higher than that of the shift operator. Consider using parentheses in the expression.

The analyzer has detected a potential error: the expression can output a different result than expected because addition, subtraction, division, and multiplication operations have a higher precedence than shift operations.

The example:

    private BigInteger OddPow (uint b, BigInteger exp)
    {
      uint [] wkspace = new uint [mod.length << 1 + 1];
      ....
    }

Most likely, it is expected that the shifting result of `mod.length` by `1` would add up to `1`. However, according to the operator precedence, the addition occurs first, followed by the shift. To fix it, add parentheses.

The fixed code:

    private BigInteger OddPow (uint b, BigInteger exp)
    {
      uint [] wkspace = new uint [(mod.length << 1) + 1];
      ....
    }

This diagnostic is classified as:

CWE-783