Global variable array pointer C programming -

i'm working on project need array of pointers structs. have created global variable functions manipulate array hold pointer array can access functions. however, i'm running problems pointer just...changes , isn't pointing right thing anymore.

i create array so:

void initpqueue() {     eventptr pqueue[qsize];     int i;     float t;     for(i = 1; < qsize; i++)     {         t = getnextrandominterval(getl());         pqueue[i] = createevent(t);      }      setpqueue(pqueue);     buildpqueue();  } 

i use setpqueue(pqueue) set global variable....like so...

void setpqueue(eventptr* pqueue) {     pqueueptr = pqueue; } 

the global variable declared as:

eventptr* pqueueptr; 

here struct: (in .h file.. atm)

struct event {     float etime;     double stime;     int status; };  typedef struct event event; typedef struct event* eventptr; 

everything awesome till point. buildpqueue works right... using pqueueptr .... however...i went make test functions output pqueue array , got ugly...

void outtest() {     int i;     printf("\n\n");     for(i = 0; < qsize; i++)     {         if(pqueueptr[i] != null) printf("%f ", pqueueptr[i]->etime);         else printf("null ");      } } 

this gives me output pointer array contains null values when not... function , last 2 in same file. put loop in setpqueue , worked fine... should in outtest...

i don't understand why this... i've come asking experts... :)

any great... :)

in initpqueue(), pqueue allocated on stack; function returns, memory not valid anymore.

to have data survive function call, need allocate on heap using malloc() (or other memory allocation function).