1 open project HELLO 2 insert int e,b,c; after main 3 in project devce select extended linker 4 translate 5 debug and see that variable e ????? what is it? is it new version?
If you assign a value to a variable and never use the variable anywhere else, what should the compiler do? Should it optimize this out or not? To answer the rhetorical question: Depends on whether the variable is declared volatile or not. If it's volatile, then there are perhaps side effects from the write -- say if it's a hardware register -- and you need to keep the assignment. If not, optimize away. So, if you're bent on keeping the variable e in the program, make sure to do something with it. Printf() it. Use it as a loop counter. Something, just to give it a reason to exist. Or just declare it volatile.