Minor question about output formatting flags

[HighCommander4]

How do I output a number such that it's never output in scientific notation, but trailing zeros aren't displayed either? I tried

cout << fixed << noshowpoint;

but it still outputs, say, 90 as 90.00000?

[bmoodie]

One way is setprecision, but I don't know the best way:

#include <iostream>
#include <iomanip>
using namespace std;
 
int main(int cargs, char **vargs) {
  cout << setprecision(0) << 90.0 << endl; // outputs "90"
  return 0;
}

http://www.cppreference.com/io_flags.html#manipulators

[HighCommander4]

Hmm... setprecision() will cause all numbers to be displayed at the same precision, whereas I need the numbers to be displayed at their default precision, but without trailing zeros.

Basically, I want numbers to be displayed the way they're displayed by default, but without getting into scientific notation when the numbers get big.

Any suggestions?

[bmoodie]

While I'm not sure exactly which settings you want, you can use resetiosflags to turn off anything you don't want:

cout << resetiosflags(ios_base::showpoint | ios_base::scientific | ios_base::fixed) << ...

I hope this helps.

- Bryan

[HighCommander4]

Hmm... that doesn't really work either. 9000000000000000000.0 is still displayed as 9e018...

Basically this is what I need...

90 to be displayed as 90 (no trailing zeros)
9e18 to be displayed as 9000000000000000000 (not in scientific form)
9.85545 to be displayed as 9.85545 (no precision loss)

Is that possible?