feholdexcept
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| Defined in header <<fenv.h>>
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| int feholdexcept( fenv_t* envp ); |
（C99 起） | |
首先，当前浮点环境保存指向的对象的
envp（fegetenv），然后清除所有的浮点状态标志，并然后安装非停止模式：未来的浮点异常不会中断执行（不会捕获），直到恢复浮点环境feupdateenv或fesetenv.Original:
First, saves the current floating-point environment to the object pointed to by
envp (similar to 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 feupdateenv or fesetenv.The text has been machine-translated via Google Translate.
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此功能可用于在开始的一个子程序，它必须隐藏的浮点异常，它可能会提高从调用者。如果只有一些例外情况必须被抑制，而其他人必须报告，非停止模式通常是调用feupdateenv结束之后清除不必要的例外.
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 feupdateenv after clearing the unwanted exceptions.
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目录 |
[编辑] 参数
| envp | - | 指针指向将被存储的对象类型fenv_t浮点环境
Original: pointer to the object of type 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. |
[编辑] 返回值
0成功，否则返回非零值.
Original:
0 on success, non-zero otherwise.
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You can help to correct and verify the translation. Click here for instructions.
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[编辑] 为例
| 本节是不完整的 原因: no example |
[编辑] 另请参阅
| （C99） |
浮点环境恢复和提高了先前抛出异常 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. （函数） |
| （C99） |
保存或恢复当前浮点环境 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. （函数） |
| （C99） |
默认的浮点环境 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. （宏不变） |
| C++ documentation for feholdexcept
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