Be serious when writing C functions. When writing a C function with the same name with the system function, the new writing function will override the original, without any warning.
![](https://img.haomeiwen.com/i56726/df0a1466fe09d4fb.png)
We've met this issue when we were using a dynamic framework, coming with a C function named strptime
, which is the same as function provided by system.
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