Warp wrote:
> 
>   This code causes it. Can you see what is the mistake?
> 
> #include <string>
> using namespace std;
> 
> int main()
> {
>     string x();
	This line doesn't define a variable of type string but a function with
no arguments that return a string and whose code is assumed to be given
elsewhere (except that I'm surprised that this works inside another
function, I would have understood better if "string x();" was before
"int main()").

>     x.clear();
	But this should work: "x().clear();" (assuming you've got the function
x defined elsewhere). Hey, I wasn't that far off! :))

> }
> 


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