| description | title | ms.date | f1_keywords | helpviewer_keywords | ms.assetid | ||
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Learn more about: Compiler Warning (level 1) C4547 |
Compiler Warning (level 1) C4547 |
11/04/2016 |
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3edf1c2e-c0d5-444d-ae83-44a7cce24bb2 |
'operator' : operator before comma has no effect; expected operator with side-effect
The compiler detected an ill-formed comma expression.
This warning is off by default. For more information, see Compiler Warnings That Are Off by Default.
The following sample generates C4547:
// C4547.cpp
// compile with: /W1
#pragma warning (default : 4547)
int i = 0;
int j = 1;
int main() {
int l = (i != i,0); // C4547
// try the following line instead
// int l = (i != i);
// or
// int l = ((void)(i != i),0);
}