Compiler Warning (level 1) C4552
Collapse the table of content
Expand the table of content
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer

Compiler Warning (level 1) C4552

Error Message

'operator' : operator has no effect; expected operator with side-effect

If an expression statement has an operator with no side effect as the top of the expression, it's probably a mistake.

To override this warning, put the expression in parentheses.

The following sample generates C4552:

// C4552.cpp
// compile with: /W1
int main() {
   int i, j;
   i + j;   // C4552
   // try the following line instead
   // (i + j);
© 2015 Microsoft