Clears (sets to 0) bit index in num. The index starts at 0.
A GMP object, an int or a numeric string.
The index of the bit to clear. Index 0 represents the least significant bit.
A GMP object.
Unlike most of the other GMP functions, gmp_clrbit must be called with a GMP object that already exists (using gmp_init for example). One will not be automatically created.