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numeric_limits::round_style

Returns a value that describes the various methods that an implementation can choose for rounding a floating-point value to an integer value.

static const float_round_style round_style = round_toward_zero;

A value from the float_round_style enumeration that describes the rounding style.

The member stores a value that describes the various methods that an implementation can choose for rounding a floating-point value to an integer value.

The round style is hard coded in this implementation, so even if the program starts up with a different rounding mode, that value will not change.

// numeric_limits_round_style.cpp
// compile with: /EHsc
#include <iostream>
#include <float.h>
#include <limits>

using namespace std;

int main( )
{
   cout << "The rounding style for a double type is: " 
        << numeric_limits<double>::round_style << endl;
   _controlfp_s(NULL,_RC_DOWN,_MCW_RC );
   cout << "The rounding style for a double type is now: " 
        << numeric_limits<double>::round_style << endl;
   cout << "The rounding style for an int type is: " 
        << numeric_limits<int>::round_style << endl;
}
The rounding style for a double type is: 1
The rounding style for a double type is now: 1
The rounding style for an int type is: 0

Header: <limits>

Namespace: std

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