remquo
, remquof
, remquol
Computes the remainder of two integer values, and stores an integer value with the sign and approximate magnitude of the quotient in a parameter.
Syntax
double remquo( double numer, double denom, int* quo );
float remquof( float numer, float denom, int* quo );
long double remquol( long double numer, long double denom, int* quo );
#define remquo(X, Y, INT_PTR) // Requires C11 or higher
float remquo( float numer, float denom, int* quo ); /* C++ only */
long double remquo( long double numer, long double denom, int* quo ); /* C++ only */
Parameters
numer
The numerator.
denom
The denominator.
quo
A pointer to an integer to store a value that has the sign and approximate magnitude of the quotient.
Return value
remquo
returns the floating-point remainder of x
/ y
. If the value of y
is 0.0, remquo
returns a quiet NaN. For information about the representation of a quiet NaN by the printf
family, see printf
, _printf_l
, wprintf
, _wprintf_l
.
Remarks
The remquo
function calculates the floating-point remainder f
of x
/ y
such that x
= n
* y
+ f
*, where n
is an integer, f
has the same sign as x
, and the absolute value of f
is less than the absolute value of y
.
C++ allows overloading, so you can call overloads of remquo
that take and return float
or long double
values. In a C program, unless you're using the <tgmath.h> macro to call this function, remquo
always takes two double
arguments and returns a double
.
If you use the <tgmath.h> remquo()
macro, the type of the argument determines which version of the function is selected. See Type-generic math for details.
By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.
Requirements
Function | Required header (C) | Required header (C++) |
---|---|---|
remquo , remquof , remquol |
<math.h> | <cmath> or <math.h> |
remquo macro |
<tgmath.h> |
For compatibility information, see Compatibility.
Example
// crt_remquo.c
// This program displays a floating-point remainder.
#include <math.h>
#include <stdio.h>
int main( void )
{
double w = -10.0, x = 3.0, z;
int quo = 0;
z = remquo(w, x, &quo);
printf("The remainder of %.2f / %.2f is %f\n", w, x, z);
printf("Approximate signed quotient is %d\n", quo);
}
The remainder of -10.00 / 3.00 is -1.000000
Approximate signed quotient is -3
See also
Math and floating-point support
ldiv
, lldiv
imaxdiv
fmod
, fmodf
remainder
, remainderf
, remainderl
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