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Hi All, Using uVision simulator and Keil arm or GNU compiler, the "else" instruction never gets xcuted. Using MSVC++ it does get xcuted. Anyone know why?? puzzleing. Thanks ---------------------------- int main (void){ unsigned int i=0,result=0; for (i=0;i<5;i++){ if (i>3) result=i*10; else result=i*5; } return(1); }//main --------------------------------
The loop always runs until i>3, so the compiler is smart enough to realise that it doesn't need to bother with the 'else' clause, because its result will always be overwritten by the 'then' clause! In fact, you never use 'result' for anything - so the compiler could actually optimise the entire function to:
return(1);
>> BTW: what do you think will happen to the return value from main...? For what it's worth, GCC complains if main() does not return a value because it is declared to return type int. If you change it to return type void, it complains about that too, so having it return something keeps GCC happy. Kathy