c 2b 2b operator overloading not equal

1lass Fred {
2public:
3  // ...
4};
5if 
6  // Without operator overloading:
7  Fred add(const Fred& x, const Fred& y);
8  Fred mul(const Fred& x, const Fred& y);
9  Fred f(const Fred& a, const Fred& b, const Fred& c)
10  {
11    return add(add(mul(a,b), mul(b,c)), mul(c,a));    // Yuk...
12  }
13else
14  // With operator overloading:
15  Fred operator+ (const Fred& x, const Fred& y);
16  Fred operator* (const Fred& x, const Fred& y);
17  Fred f(const Fred& a, const Fred& b, const Fred& c)
18  {
19    return a*b + b*c + c*a;
20  }
21#endif