fmtflags setf( fmtflags flags ); | (1) | |
fmtflags setf( fmtflags flags, fmtflags mask ); | (2) |
Sets the formatting flags to specified settings.
1) Sets the formatting flags identified by
flags
. Effectively the following operation is performed fl = fl | flags
where fl
defines the state of internal formatting flags. 2) Clears the formatting flags under
mask
, and sets the cleared flags to those specified by flags
. Effectively the following operation is performed fl = (fl & ~mask) | (flags & mask)
where fl
defines the state of internal formatting flags.Parameters
flags, mask | - | new formatting setting. mask defines which flags can be altered, flags defines which flags of those to be altered should be set (others will be cleared). Both parameters can be a combination of the following constants:
|
Return value
the formatting flags before the call to the function.
Example
#include <iostream> #include <iomanip> const double PI = 3.1415926535; int main() { const int WIDTH = 15; std::cout.setf(std::ios::right); //equivalent: cout << right; std::cout << std::setw(WIDTH/2) << "radius" << std::setw(WIDTH) << "circumference" << '\n'; std::cout.setf(std::ios::fixed); for (double radius = 1; radius <= 6; radius += 0.5) { std::cout << std::setprecision(1) << std::setw(WIDTH/2) << radius << std::setprecision(2) << std::setw(WIDTH) << (2 * PI * radius) << '\n'; } }
Output:
radius circumference 1.0 6.28 1.5 9.42 2.0 12.57 2.5 15.71 3.0 18.85 3.5 21.99 4.0 25.13 4.5 28.27 5.0 31.42 5.5 34.56 6.0 37.70
See also
manages format flags (public member function) | |
clears specific format flag (public member function) |
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