#include <cstdio>
 
class BaseClass
{
    public:
        void func(int a){puts("BaseClass::func(int)");};
        void func(int a, int b){puts("BaseClass::func(int, int)");};
        void func(int a, int b, int c){puts("BaseClass::func(int, int, int)");};
        //...
};
 
class DerivedClass : public BaseClass
{
    public:        
        void func(int a){puts("DerivedClass::func(int)");}
        using BaseClass::func;
        //...             
};
 
int main()
{           
    DerivedClass obj;
    obj.func(0);
    obj.func(0,0);
 
    return 0;
}

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