Left of the dot precision

Question

What I'm trying to is to write something like this

file << someFunction(5) << hex << 3;

And to get an output like this 00003 instead of 3 (and 300 will be 00300, etc)

Note:- Sorry if this was asked before, I don't know what term to search for to get this

EDIT:- I mean the zero's to the left, i included the hex part just to be clear I want it to be compatible with this format

Do you mean hexadecimal representation, or do you mean padding with zero on the left side? The code seems to point to the former, but the example of input and output seems to point to the latter. — Aleph, May 09 '13 at 13:59

score 12 · Accepted Answer · edited May 23 '17 at 12:23

12

I believe this is what you mean.

#include <iostream>
#include <iomanip>
int main()
{
   std::cout << std::setw(5) << std::setfill('0') << 3 << '\n';
   return 0;
}

Output

edited May 23 '17 at 12:23

Community

answered May 09 '13 at 14:02

BoBTFish

score 4 · Answer 2 · answered May 09 '13 at 14:03

4

Use

file << setfill('0') << setw(5) << 3;

to get 00003 instead of 3

answered May 09 '13 at 14:03

Oszkar

score 2 · Answer 3 · answered May 09 '13 at 14:05

2

iomanip is what you need to search for.

#include <iomanip>

then

file << someFunction(5) << hex << setw(5) << setfill('0') << 3 << endl;

answered May 09 '13 at 14:05

parkydr

3 Answers3