September 11th, 2003, 09:23 PM
How do I get a structure member out of a pointer?
Being a novice in C I have lot of question here is one of them and it is in the bugbear of C beginners that is Pointers:
I have the function signature:
float timer(struct timespec* ts1)
struct tm startT;
startT = *(localtime ((time_t *) &(start.tv_sec)));
When I compile this I get an error because the method localtime in Time.h expects a timespec structure itself and NOT A POINTER to the timespec structure. Which brings me to the simple question how can I get access to the variable I am behind (start.tv_sec, which is a member of the structure) using the pointer that I have. I want to avoid passing in the structure itself.
Your input is appreciated.
September 12th, 2003, 03:04 AM
try something like
tm *pTime=NULL;//pointer to a tm struct
time_t SysTime;//an actual instance of the struc
//get the time
time(&SysTime);// the & sends in a pointer to our struct
//convert to local
//to look at an element of our struct pointer use the -> not .
Last edited by TechNoFear; September 12th, 2003 at 03:07 AM.
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