C means class method
| Fixnum |
| + abs( ) : Fixnum |
| + pred( ) : Fixnum |
| + power!(Float) : Float |
| + size( ) : Fixnum |
| + succ( ) : Fixnum |
| + to_f( ): Float |
| + to_s( ): String |
| + zero?( ): Boolean |
| + +(Fixnum): Fixnum |
| + -(Fixnum): Fixnum |
| + *(Fixnum): Fixnum |
| + /(Fixnum): Fixnum |
| + %(Fixnum): Fixnum |
| + ==(Fixnum): Boolean |
| + <=>(Fixnum): Fixnum |