c++ - Segmentation Fault upon call to GetSystemTime() function (Windows) -

i'm having trouble dealing segmentation fault. following sanity check throws one:

#include <windows.h> int main() {     lpsystemtime starttime;     getsystemtime(starttime); } 

however, i've used same code in larger program, , runs without problem. i've tried adding delays in various places in case problem stems sort of multithreading within getsystemtime(), did not solve problem.

i'm compiling mingw-gcc in codeblocks.

lpsystemtime pointer systemtime structure. don't initialize pointer it's pointing somewhere scenery, hence access violation/seg fault.

in order make code work, have make sure pointer points valid systemtime structure. per msdn docs, microsoft explicitly warns passing in null pointer result in access violation.