Fixed function of setprecision() is sticky

Asked Dec 12 '17 at 23:19

Active Dec 12 '17 at 23:19

Viewed 296 times

#include <iostream>
#include <iomanip>
int main() {
    float a = 456.123456789;
    std::cout << a << "\n"; //State 1
    std::cout << "fixed " << fixed << a << "\n"; //State 2
    std::cout << a << "\n"; //State 3
}

Output:

456.123 //State 1
fixed 456.123444 //State 2
456.123444 //State 3

What I want to do is switch back to state 1, so how can I do that? I tried a couple of things based on http://www.cplusplus.com/reference/iomanip/setprecision/ and all failed.

asked Dec 12 '17 at 23:19

Shayan

What does *fixed state* mean? – wallyk Dec 12 '17 at 23:21
Write a function. – Dec 12 '17 at 23:22
note: all of the maniuplators are sticky except for `setw` – M.M Dec 12 '17 at 23:24
@wallyk On line 3 I want to be able to print out w/e that just got printed on line 1 and not the same thing as printed on line 2. – Shayan Dec 12 '17 at 23:24
@M.M I think setw() is also sticky. – Shayan Dec 12 '17 at 23:24
1

@Shayan try `std::cout << ',' << std::setw(6) << 1 << ',' << 1;` – M.M Dec 12 '17 at 23:26
1

Use `std::cout << defaultfloat << a << "\n";`. It will unset `floatfield`. – abdullah Dec 12 '17 at 23:29
@abdullah that worked like a charm, better answer than on the duplicate page. – Shayan Dec 12 '17 at 23:30

Fixed function of setprecision() is sticky

0 Answers0