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std::fegetenv, std::fesetenv - cppreference.com

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Definido no cabeçalho

<cfenv>

int fegetenv( std::fenv_t* envp )

 (1) (desde C++11)

int fesetenv( const std::fenv_t* envp );

 (2) (desde C++11)

1)

tenta armazenar o status do ambiente de ponto flutuante no objeto apontado por envp.

Original:

Attempts to store the status of the floating-point environment in the object pointed to by envp.

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2)

tentativas para estabelecer o ambiente de ponto flutuante do objeto apontado por envp. O valor de que objeto deve ser obtido previamente por uma chamada para std::feholdexcept ou std::fegetenv ou ser um macro de ponto flutuante constante. Se alguma das bandeiras de ponto flutuante de status são definidos em envp, eles ficam no meio ambiente (e são, então, testáveis ​​com std::fetestexcept), mas os correspondentes exceções de ponto flutuante não são levantadas (execução continua ininterrupta)

Original:

Attempts to establish the floating-point environment from the object pointed to by envp. The value of that object must be previously obtained by a call to std::feholdexcept or std::fegetenv or be a floating-point macro constant. If any of the floating-point status flags are set in envp, they become set in the environment (and are then testable with std::fetestexcept), but the corresponding floating-point exceptions are not raised (execution continues uninterrupted)

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Parâmetros

envp -

Ponteiro para o objeto de std::fenv_t tipo que detém o status de o ambiente de ponto flutuante

Original:

pointer to the object of type std::fenv_t which holds the status of the floating-point environment

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Valor de retorno

0 em caso de sucesso, não-zero, caso contrário.

Original:

0 on success, non-zero otherwise.

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Veja também

poupa o meio ambiente, limpa todos os sinalizadores de status e ignora todos os erros futuros

Original:

saves the environment, clears all status flags and ignores all future errors

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(função) [edit]

restaura o ambiente de ponto flutuante e levanta a anteriormente levantar exceções

Original:

restores the floating-point environment and raises the previously raise exceptions

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(função) [edit]

ambiente padrão de ponto flutuante

Original:

default floating-point environment

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(macro constante) [edit]