CFA Version 1.0.0 (debug) Error: Can't choose between alternatives for expression Cast of: Name: f to: char Alternatives are: Cost ( 1, 0, 0 ): Cast of: Variable Expression: f: function accepting unspecified arguments returning nothing to: char (types: char ) Environment: Cost ( 1, 0, 0 ): Cast of: Variable Expression: f: signed int to: char (types: char ) Environment: Cost ( 1, 0, 0 ): Cast of: Variable Expression: f: double to: char (types: char ) Environment: make: *** [castError] Error 1