문제

Java:

float big = (float) 1e12;
float ulp = Math.ulp(big);

float result = (big + 2/3*ulp) - big;

result is 0.0, while I was expecting ulp (65536.0). Can somebody explain why?

도움이 되었습니까?

해결책

This is because 2/3 = 0 (integer division), try 2.0 / 3

다른 팁

You may try this:

float result = (big + 2f/3*ulp) - big;

ie, you need to typecast the division values else integer/integer will result to zero.

Try typecasting either 2 or 3 to float and try, as 2/3=0, thats why result=0.0

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