在下列程序中，判断语句1～5是否有二义性。
class Basel{}
public：
int x;
int funl();
int fun2();
int fun2(int);
int fun3();
};
class Base2{
int x;
int funl();
public:
char fun2();
int fun3();
class Derived:public Basel,public Base2();
void main(){
Derived obi;
Derived*ptr=&obj;
ptr—>x=1; //1
ptr—>funl(); //2
ptr->fun2(); //3
ptr->fun2(10); //4
ptr—>fun3(); //5
} 
