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std::feraiseexcept(3) C++ Standard Libary std::feraiseexcept(3) NAME std::feraiseexcept - std::feraiseexcept Synopsis Defined in header <cfenv> int feraiseexcept( int excepts ); (since C++11) Attempts to raise all floating point exceptions listed in excepts (a bitwise OR of the floating point exception macros). If one of the exceptions is FE_OVERFLOW or FE_UNDERFLOW, this function may additionally raise FE_INEXACT. The order in which the exceptions are raised is unspecified, except that FE_OVERFLOW and FE_UNDERFLOW are always raised before FE_INEXACT. Parameters excepts - bitmask listing the exception flags to raise Return value 0 if all listed exceptions were raised, non-zero value otherwise. Example // Run this code #include <iostream> #include <cfenv> #pragma STDC FENV_ACCESS ON int main() { std::feclearexcept(FE_ALL_EXCEPT); int r = std::feraiseexcept(FE_UNDERFLOW | FE_DIVBYZERO); std::cout << "Raising divbyzero and underflow simultaneously " << (r?"fails":"succeeds") << " and results in\n"; int e = std::fetestexcept(FE_ALL_EXCEPT); if (e & FE_DIVBYZERO) { std::cout << "division by zero\n"; } if (e & FE_INEXACT) { std::cout << "inexact\n"; } if (e & FE_INVALID) { std::cout << "invalid\n"; } if (e & FE_UNDERFLOW) { std::cout << "underflow\n"; } if (e & FE_OVERFLOW) { std::cout << "overflow\n"; } } Output: Raising divbyzero and underflow simultaneously succeeds and results in division by zero underflow See also feclearexcept clears the specified floating-point status flags (C++11) (function) fetestexcept determines which of the specified floating-point sta- tus flags are set (C++11) (function) http://cppreference.com 2022.07.31 std::feraiseexcept(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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