std::feholdexcept
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Definido no cabeçalho <cfenv> | ||
int feholdexcept( std::fenv_t* envp ) | (desde C++11) | |
Primeiro, poupa o meio ambiente de ponto flutuante atual para o objeto apontado por
envp (semelhante ao std::fegetenv), em seguida, apaga todas as bandeiras de ponto flutuante de estado, e depois instala o modo non-stop: futuros exceções de ponto flutuante não vai interromper a execução ( não prender), até que o ambiente de ponto flutuante é restaurado por std::feupdateenv ou std::fesetenv.Original:
First, saves the current floating-point environment to the object pointed to by
envp (similar to std::fegetenv), then clears all floating-point status flags, and then installs the non-stop mode: future floating-point exceptions will not interrupt execution (will not trap), until the floating-point environment is restored by std::feupdateenv or std::fesetenv.The text has been machine-translated via Google Translate.
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Esta função pode ser utilizada no início de uma sub-rotina que deve esconder as excepções de ponto flutuante pode aumentar a partir do chamador. Se apenas algumas exceções devem ser suprimidos, enquanto outros devem ser relatados, o modo non-stop é geralmente terminou com uma chamada para std::feupdateenv depois de limpar as exceções indesejados.
Original:
This function may be used in the beginning of a subroutine that must hide the floating-point exceptions it may raise from the caller. If only some exceptions must be suppressed, while others must be reported, the non-stop mode is usually ended with a call to std::feupdateenv after clearing the unwanted exceptions.
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[editar]Parâmetros
| envp | - | ponteiro para o objeto de std::fenv_t tipo onde o ambiente de ponto flutuante será armazenado Original: pointer to the object of type std::fenv_t where the floating-point environment will be stored The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[editar]Valor de retorno
0 em caso de sucesso, não-zero, caso contrário.
Original:
0 on success, non-zero otherwise.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[editar]Veja também
(C++11) | restaura o ambiente de ponto flutuante e levanta a anteriormente levantar exceções Original: restores the floating-point environment and raises the previously raise exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função) |
(C++11) | salva ou restaura o ambiente actual ponto flutuante Original: saves or restores the current floating point environment The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função) |
(C++11) | ambiente padrão de ponto flutuante Original: default floating-point environment The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (macro constante) |
