Fix warning: 'Foo::fooObj1' should be initialized in the member initialization list [-Weffc++]

foo.h

#ifndef FOO_H
#define FOO_H

class Foo
{
    int fooObj1;
    bool fooObj2;
public:
    Foo(int input1);
};

#endif

foo.cpp

#include "foo.h"

Foo::Foo(int input1)
{
    fooObj1 = input1;
    // some code logic to decide the value of fooObj2 (an example)
    fooObj2 = (fooObj1 % 2 == 0);
}

So I was following a tutorial and they told me to turn on [-Weffc++] and treat warnings as errors. But when I do that, [-Weffc++] give a warning: 'Foo::fooObj1' should be initialized in the member initialization list [-Weffc++] and 'Foo::fooObj2' should be initialized in the member initialization list [-Weffc++]. But I can't really do member initialization list in this project. So how can I reslove this warning?