I can't get the double result in my code

Question

In my code I can't get the right division I don't know why

I have for example ;

int N =5;
int df = 2;
double value = N/df;

when I use the previous code I get the value = 2 , I need return 2.5

http://stackoverflow.com/questions/661028/how-can-i-divide-two-integers-to-get-a-double — Otiel, Jul 01 '13 at 09:42
Yeah, the conversion happens AFTER the integer division, when you already lost the decimal part. — xiaofeng.li, Jul 01 '13 at 09:42

Dmitry Bychenko · Answer 1 · 2013-07-01T09:58:49.017

3

You can convert one of the arguments to double:

  int N = 5;
  int df = 2;
  double value = ((double)N)/df;

or you can initially declare N and/or df as Double

  double N = 5;
  double df = 2;
  double value = N/df;

edited Jul 01 '13 at 09:58

answered Jul 01 '13 at 09:42

Dmitry Bychenko

Sorry, but it does work since I explicitly declare N and df as double. You have to add ".0" in expressions like this: 5.0 / 2.0 which could be ambiguous (5 - integer, 5.0 - double) – Dmitry Bychenko Jul 01 '13 at 09:45
Sorry Dimitry, it does work. I had something else in my mind. – FeliceM Jul 01 '13 at 09:56

FeliceM · Answer 2 · 2013-07-01T09:56:26.790

1

An int divided another int gives you an int. One of the two should be a double. This will work:

double N =5.0;
double df = 2.0;
double value = N/df;

This will work:

double N =5;
int df = 2;
double value = N/df;

edited Jul 01 '13 at 09:56

answered Jul 01 '13 at 09:41

FeliceM

@JeffRSon, you are right. I had something else in my mind. Sorry. – FeliceM Jul 01 '13 at 09:58

score 0 · Answer 3 · answered Jul 01 '13 at 09:45

0

Also you can add any double value to calculations

double N =5;
double df = 2;
double value = N*1.0/df;

answered Jul 01 '13 at 09:45

E-Max

score 0 · Answer 4 · answered Jul 01 '13 at 09:45

0

try this......

int N =5;
int df = 2;
double value = (double) N/df;

answered Jul 01 '13 at 09:45

Bala

While answer works, please try to provide an explanation along with it. – Morwenn Jul 01 '13 at 10:02

4 Answers4