how to get timestamp in c

Question

I want to get timestamp for my log in c. i have written a function to get timestamp. But when i return the variable i m getting different value.

My code:

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Answer 1

You are returning a pointer to a stack variable and therefore it is not valid to use after the function returns:

 char buffer[16];

Will be allocated on the stack in the function. When you return the stack is cleaned up and buffer is no longer valid. With minimal changes this is probably a better function signature:

void get_timestamp( char *buffer, size_t buffLen  )

The assumption being that you have properly allocated space for buffer before calling get_timestamp.