REMQUO(3M) Mathematical Library Functions REMQUO(3M)

# NAME

remquo, remquof, remquol - remainder functions

# SYNOPSIS

```c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double remquo(double x, double y, int *quo);```

`float remquof(float x, float y, int *quo);`

`long double remquol(long double x, long double y, int *quo);`

# DESCRIPTION

The remquo(), remquof(), and remquol() functions compute the same remainder as the remainder(), remainderf(), and remainderl() functions, respectively. See remainder(3M). In the object pointed to by quo, they store a value whose sign is the sign of x/y and whose magnitude is congruent modulo 2^n to the magnitude of the integral quotient of x/y, where n is an integer greater than or equal to 3.

# RETURN VALUES

These functions return x REM y.

If x or y is NaN, a NaN is returned.

If x is ±Inf or y is 0 and the other argument is non-NaN, a domain error occurs and a NaN is returned.

# ERRORS

These functions will fail if:

Domain Error

The x argument is Inf or the y argument is 0 and the other argument is non-NaN.

If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid floating-point exception is raised.

# USAGE

An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions.

# ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

 ATTRIBUTE TYPE ATTRIBUTE VALUE Interface Stability Standard MT-Level MT-Safe