Compiler Warning (level 1) C4555

expression has no effect; expected expression with side-effect

Remarks

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.

Example

For example:

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

void func1()
{
   1;   // C4555
}

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

int main()
{
}