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Hello,

Here are two questions on formatting values using printf():

1. How to strip trailing zeroes from float values?
printf("%f %f", 1.777, 1.2) displays "1.777000 1.200000",
while I want to have "1.777 1.2", without loosing 6-digit
precision.

2. Is it possible to pad values with other characters than
space and zero? printf(">%5s<", "abc") displays "> abc<".
I would like to have e.g. ">##abc<" or ">--abc<".

Thank you!

Piotr B. wrote:
> Here are two questions on formatting values using printf():
>
> 1. How to strip trailing zeroes from float values?
> printf("%f %f", 1.777, 1.2) displays "1.777000 1.200000",
> while I want to have "1.777 1.2", without loosing 6-digit
> precision.

Use %g.

> 2. Is it possible to pad values with other characters than
> space and zero? printf(">%5s<", "abc") displays "> abc<".
> I would like to have e.g. ">##abc<" or ">--abc<".

Not for outputting strings. Create a temporary string and do
your own padding.

V

"Piotr B." wrote:
>
> 1. How to strip trailing zeroes from float values?
> printf("%f %f", 1.777, 1.2) displays "1.777000 1.200000",
> while I want to have "1.777 1.2", without loosing 6-digit
> precision.

printf("%.3f %.2f", 1.777, 1.2);

Read the standard. Don't cross post between c.l.c and c.l.c++;
they are different languages. Follow-ups set. c.l.c++ probably
won't use printf anyhow.

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