Compiler Warning (level 1) C4145

'expression1' : relational expression as switch expression; possible confusion with 'expression2'

Remarks

A switch statement uses a relational expression as its control expression, which results in a Boolean value for the case statements. Did you mean expression2?

Example

The following example generates C4145:

// C4145.cpp
// compile with: /W1
int main() {
   int i = 0;
   switch(i == 1) {   // C4145, use i instead of i == 1 to resolve
      case 1:
         break;
      default:
         break;
   }
}