example4_functors.cpp

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#include <iostream>
#include <functional>

class Divider {
public:
    double operator()(double a, double b) const {
        return a / b;
    }
};

int main() {
    std::function<double(double, double)> func = Divider();
    
    std::cout << "Result: " << func(10.0, 2.0) << std::endl;
    return 0;
}