V1064. The left operand of integer division is less than the right one. The result will always be zero.

The analyzer has detected a suspicious expression that contains an integer division or modulo operation, with the left operand always being less than the right operand. Such an expression will always evaluate to zero.

Consider the following example:

if ( nTotal > 30 && pBadSource->m_nNegativeVotes / nTotal > 2/3 )
{
  ....
}

Since both literals '2' and '3' are of integer type, the quotient will also be integer and, therefore, zero. It means the expression above is equivalent to the following one:

if ( nTotal > 30 && pBadSource->m_nNegativeVotes / nTotal > 0 )
{
  ....
}

A correct way to fix this error is to explicitly cast one of the operands to a floating-point type, for example:

if ( nTotal > 30 && pBadSource->m_nNegativeVotes / nTotal >
                            static_cast<float>(2)/3 )
{
  ....
}

Or:

if ( nTotal > 30 && pBadSource->m_nNegativeVotes / nTotal > 2.0f/3 )
{
  ....
}

According to Common Weakness Enumeration, potential errors found by using this diagnostic are classified as CWE-682.


Bugs Found

Checked Projects
411
Collected Errors
14 100
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