C/C++ Compiler (cl.hlp) (Table of Contents; Topic list)
C4705
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     Compiler warning (level 4) C4705
 
     statement has no effect
 
     The indicated statement will have no effect on the program
     execution.
 
     Each of these statements will generate this warning:
 
          1;
          a + 1;
          b == c;
                                    -♦-