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/* File : example.h */
enum error {OK, OVERFLOW, DIVISION_BY_ZERO, NEGATIVE_RADICAND, NEGATIVE_BASE};
typedef error errorstate; /* just to separate the typemaps */
error acc_add (double &x, double y);
error acc_sub (double &x, double y);
error acc_mul (double &x, double y);
error acc_div (double &x, double y);
double op_add (double x, double y, errorstate &err);
double op_sub (double x, double y, errorstate &err);
double op_mul (double x, double y, errorstate &err);
double op_div (double x, double y, errorstate &err);
double op_sqrt (double x, errorstate &err);
double op_pow (double x, double y, errorstate &err);
double op_noexc (double x, double y);
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