# 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:

```cpp
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:

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