CODEWITHSUNDEEP
c++
stack_overflow_nickname
stack_overflow_nickname

Reputation: 141

How can I make float numbers display -0 also as 0?

If I divide a float 0 by a negative value I get displayed -0 which is inconvenient. How can I get rid of this issue?

float a = 0;
std::cout << a / (-1);

I've tried to check if a number is equal with -0 and if that condition were true, to multiply the variable by -1. This doesn't work because 0 is equal to -0.

Upvotes: 4

Views: 122

Answers (1)

Bathsheba
Bathsheba

Reputation: 234875

Writing a + 0.0f gets rid of the signed zero for a float type a.

(This is defined by IEEE754 and is a standard trick well-known to numericists.)

So if you have an expression that might yield a signed zero, append 0.0f to the end:

std::cout << a / (-1) + 0.0f;

Upvotes: 5

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