test.cpp

#include <stdio.h>
#include <random>
#include <vector>

class A {
public:
    virtual void doit() { printf("A::doit\n"); }
};

class B {
public:
    virtual void doit() { printf("B::doit\n"); }
};

class C : public A, public B {
public:
    using B::doit;
};

int main(int argc, char** argv) {
    C* c = new C();
    c->doit();
}