float f(float a, float b, float c)
{ return (a*b) + c; }

double g(double a, double b, double c)
{ return (a*b) + c; }

extern float h(double a, double b, double c);


int main()
{  double a, b, c;
   a = 2.0; b = 3.0; c = 4.0;
   printf("%f\n%f\n%f\n",f(a,b,c),g(a,b,c),h(a,b,c));
   exit(0);
}