double  payCalc(double P,double  yir, double  y)

 {
    double  mir, a, b, c, d, e, f, Payment;
    mir = yir/1200;
    a = 1+mir;
    b = 1/a;`?`enter code here`
    c = 12*y;
    d = pow(b,c);
    e = 1-d;
    f = P*mir;":?
 return Payment;
  }

   int main ()
 {
    cout<<fixed<<setprecision(2); //setting
    double P, yir, y;
    cin>>P>>yir>>y;
    double payCalc(P, yir, y);
    cout<<"Principal: "<<P<<" Interest Rate: "<<yir<<" Years: "<<y<<
    " Payment: "<<payCalc<<endl;
   }