Program to illustrate Default Arguments


    #include <iostream.h>
    #include <conio.h>
    double poly (double, double, double = 0, double = 0, double = 0 );
    void main( )

    {
    double x = 2.0003 ;
    cout<<" poly(x,7)  =  " <<  poly(x,7) << endl;
    cout<<" poly(x,7,6)  =  " <<  poly(x,7,6) << endl;
    cout<<" poly(x,7,6,5)  =  " <<  poly(x,7,6,5) << endl;
    cout<<" poly(x,7,6,5,4)  =  " <<  poly(x,7,6,5,4) << endl;
      }
            double poly (double x, double a0, double a1, double a2, double a3 )
     {
        return  a0 +(a1 + (a2 + a3 *x)*x)*x;
    }

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