根据下列程序的执行结果，可以断定划线部分的修饰符应为 【14】 。
执行结果：
i9a football is created.
a football is created.
i=10
a football is destroyed.
a football is created.
i=20
a football is destroyed.
a football is destroyed.
源程序：
# inelude＜iostream. h＞
class Football
{
public:
Football() {cout＜＜"a football is created. "＜＜end1; }
～Football() {cout＜＜"a football is destroyed. "＜＜end1;
};
void func(int i)
{
______ Football f1;
Football f2;
cout＜＜"i= "＜＜i＜＜end1;
}
void main()
{
func(10);
func(20);
}