▲ 911 ▼ I wish (i.imgur.com) submitted 2 years ago by nave@lemmy.zip to c/lemmyshitpost@lemmy.world 187 comments fedilink hide all child comments
[–] homura1650@lemmy.world 1 point 2 years ago (1 child) If you are using floats, you really do not want to have an isEven function ... permalink fedilink source parent hideshow 2 child comments replies: [–] 257m@sh.itjust.works 1 point 2 years ago (1 child) Whats the alternative a macro? An inline function is perfectly fine for checking if a nunber is even. Compiler will probably optimize it to a single and instruction. permalink fedilink source parent hideshow 2 child comments replies: [–] homura1650@lemmy.world 2 points 2 years ago* (last edited 2 years ago) (1 child) No. The alternative is to not use a float. Testing if a float is even simply does not make sense. Even testing two floats for equality rarely makes sense. What is the correct output of isEven((.2 + .4) ×10) Hint: (.2 + .4) x 10 != 6 permalink fedilink source parent hideshow 2 child comments replies: [–] 257m@sh.itjust.works 1 point 2 years ago* It does if it dosen't have a decimal. If it has decimal then it automatically isn't and the function will return false. Are you talking about cases like 0.1 + 0.2 equaling 0.3000000004 because that is just due to the nature of floats and there is nothing a function can do other than use larger floats for more accuracy. permalink fedilink source parent
[–] 257m@sh.itjust.works 1 point 2 years ago (1 child) Whats the alternative a macro? An inline function is perfectly fine for checking if a nunber is even. Compiler will probably optimize it to a single and instruction. permalink fedilink source parent hideshow 2 child comments replies: [–] homura1650@lemmy.world 2 points 2 years ago* (last edited 2 years ago) (1 child) No. The alternative is to not use a float. Testing if a float is even simply does not make sense. Even testing two floats for equality rarely makes sense. What is the correct output of isEven((.2 + .4) ×10) Hint: (.2 + .4) x 10 != 6 permalink fedilink source parent hideshow 2 child comments replies: [–] 257m@sh.itjust.works 1 point 2 years ago* It does if it dosen't have a decimal. If it has decimal then it automatically isn't and the function will return false. Are you talking about cases like 0.1 + 0.2 equaling 0.3000000004 because that is just due to the nature of floats and there is nothing a function can do other than use larger floats for more accuracy. permalink fedilink source parent
[–] homura1650@lemmy.world 2 points 2 years ago* (last edited 2 years ago) (1 child) No. The alternative is to not use a float. Testing if a float is even simply does not make sense. Even testing two floats for equality rarely makes sense. What is the correct output of isEven((.2 + .4) ×10) Hint: (.2 + .4) x 10 != 6 permalink fedilink source parent hideshow 2 child comments replies: [–] 257m@sh.itjust.works 1 point 2 years ago* It does if it dosen't have a decimal. If it has decimal then it automatically isn't and the function will return false. Are you talking about cases like 0.1 + 0.2 equaling 0.3000000004 because that is just due to the nature of floats and there is nothing a function can do other than use larger floats for more accuracy. permalink fedilink source parent
[–] 257m@sh.itjust.works 1 point 2 years ago* It does if it dosen't have a decimal. If it has decimal then it automatically isn't and the function will return false. Are you talking about cases like 0.1 + 0.2 equaling 0.3000000004 because that is just due to the nature of floats and there is nothing a function can do other than use larger floats for more accuracy. permalink fedilink source parent
