int main() { Fraction fra; fra.Sim(2,-108); fra.Pri(); fra.Add(6,5,2,9); fra.Pri(); cout<<fra.Swi()<<endl; fra.Sub(2,5,-1,5); fra.Pri(); fra.Mul(6,2,0,5); fra.Pri(); fra.Rec(3,-2); fra.Pri(); fra.Div(3,6,0,4); return 0; }