linux - Infinite loop when simplifying fractions in binary in C -


i'm trying simplify fractions in binary code checks if value even:

int is_even(floatlet value){   if(value & 1) return 0;   return 1; }

and while loop keeps bit shifting until value odd. 

while(is_even(numerator) && is_even(denomexp)){   numerator >>= 1;   denomexp <<= 1; }

the while loop goes on infinite loop. i'm wondering why? we've done test , is_even function works fine. thanks!

your loop incorrect: should shifting demonexp right too. runs indefinitely numerator=0 , denomexp.

if numerator , denomexp integer types, , number fraction numerator/denomexp, can fix code way:

while (numerator && is_even(numerator) && is_even(denomexp)) {     numerator >>= 1;     denomexp >>= 1; }

conversely, if denomexp power of 2 divide numerator, should increment instead, , maybe test overflow:

while (numerator && is_even(numerator)) {     numerator >>= 1;     denomexp += 1; }

you must post type definition , semantics complete code in question.


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