nice printing 0 not -4.44e-14

[Gary Wessle]

Hi

I am expecting to get "0" (that is zero) printed but getting
"-2.7311e-14" almost zero. not nice for printing.

double a = \*...code calculations ...*\
some times a becomes a real, integer or natural number and I like it
to print in nice human read format.

cout << setw(20) << left << setprecision(5) << a;

thank you

 

[Mike Wahler]

Hi

I am expecting to get "0" (that is zero) printed but getting
"-2.7311e-14" almost zero. not nice for printing.

double a = \*...code calculations ...*\
some times a becomes a real, integer or natural number and I like it
to print in nice human read format.

cout << setw(20) << left << setprecision(5) << a;

std::cout << std::fixed
<< std::setprecision(5)
<< std::left
<< std::setw(20)
<< a;

However, for numeric output, I generally prefer
std::right over std::left

-Mike