var a;
function fooa()
    var a;
    a := 2;
    return a;
endfunction

function foob()
    var b;
    b := 4;
    if (b)
        var x;
        x := 2;
        return x;
    endif
    return b;
endfunction

var c;

if (a)
    var d;
endif

fooa();
foob();