int feraiseexcept(int excepts);
The feraiseexcept() function shall attempt to raise the supported floating-point exceptions represented by the argument excepts. The order in which these floating-point exceptions are raised is unspecified. Whether the feraiseexcept() function additionally raises the inexact floating-point exception whenever it raises the overflow or underflow floating-point exception is implementation-defined.
If the argument is zero or if all the specified exceptions were successfully raised, feraiseexcept() shall return zero. Otherwise, it shall return a non-zero value.
No errors are defined.
The following sections are informative.
The effect is intended to be similar to that of floating-point exceptions raised by arithmetic operations. Hence, enabled traps for floating-point exceptions raised by this function are taken.
Raising overflow or underflow is allowed to also raise inexact because on some architectures the only practical way to raise an exception is to execute an instruction that has the exception as a side effect. The function is not restricted to accept only valid coincident expressions for atomic operations, so the function can be used to raise exceptions accrued over several operations.
feclearexcept() , fegetexceptflag() , fesetexceptflag() , fetestexcept() , the Base Definitions volume of IEEE Std 1003.1-2001, <fenv.h>