k.cpp

#include <iostream>

class Aab {
public:
    int b_ = 0;
    float c_ = 0;

    Aab(int b) {
        this->b_ = b;
    }

    Aab(float b) {
        this->c_ = b;
    }

    void print(void) {
        if (this->b_) {
            std::cout << b_ << std::endl;
        } else if (this->c_) {
            std::cout << c_ << std::endl;
        }
    }
};

void tryy(Aab b) {
    b.print();
}

int main(void) {
    tryy(1);
    tryy(1.1f);

    return 0;
}