My program results -0.0 value. Is this correct ?

Issue

• This program results -0.0 value. Is this correct? A bug?

$ cat float.c
#include<stdio.h>

int main(){  
  double a = 0;  
  double b = a * (-1.0);  
  printf("%f", b);  
  return 0;  
}

$ gcc float.c

$ ./a.out
-0.00000