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8.6 Numeric value

There are also characters that represent numbers without a digit system, like the Roman numerals, and fractional numbers, like 1/4 or 3/4.

The following type represents the numeric value of a Unicode character.

— Type: uc_fraction_t

This is a structure type with the following fields: 

          int numerator;
          int denominator;

An integer n is represented by numerator = n, denominator = 1.

The following function converts a number character to its numerical value.

— Function: uc_fraction_t uc_numeric_value (ucs4_t uc)

Returns the numeric value of a Unicode character. The return value is a fraction, or the pseudo-fraction { 0, 0 } for characters that do not represent a number.