Why when I search for the definition of the flash_open() function, I find #define flash_open()

一沙一世

Why when I search for the definition of the flash_open() function, I find #define flash_open() [Copy link]

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There is a function flash_open() in a function. When looking for the definition of this function, it is found that #define flash_open(). If this flash_open() function is a system native function, then why is #define flash_open() still needed?

void meter_read_data(void)
{
flash_open();

}

#define flash_open()

一沙一世

Why no one replied?

damiaa

#define flash_open()

The flash_open() in the following statement is replaced with an empty string. That is, all the flash_open() statements you see later are deleted after preprocessing. But you don't need to delete it manually (the code is retained but not compiled).