Modular Data Acquisition
Distributed Measurement and Control
High-Performance Test
Automated Test System Development Software
Perspectives showcases how NI sees what’s next in the world of test and technology.
You can request repair, RMA, schedule calibration, or get technical support. A valid service agreement may be required.
Provides support for NI data acquisition and signal conditioning devices.
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments.
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
修改时间 05-13-2021 12:58 AM
软件版本： 2015 专业开发版， 2018专业开发版均试过。 哪位大神试下是怎么回事?
修改时间 05-13-2021 09:11 AM
这是最基础的计算机数据存储知识. 无论何种编程语言.
只要是浮点的数据 (float, double), 你输入是 1.95, 实际上被记住的是 1.95 ± ϵ
ϵ 很小, 例如 10E-19
所以对浮点数据来说, "等于"是没意义的.
一般用:
| A - B | > 一个自定义的常数, 来判定二者是否足够接近.
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