Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize

Compiler Warning (level 1) C4555

expression has no effect; expected expression with side-effect

This warning informs you when an expression has no effect.

This warning is off by default. See Compiler Warnings That Are Off by Default for more information.

For example:

// C4555.cpp
// compile with: /W1
#pragma warning(default:4555)

void func1()
{
   1;   // C4555
}

void func2()
{
   int x;
   x;   // C4555
}

int main()
{
}
Show:
© 2015 Microsoft