sprintf(srchkey,"S%d ", i);
snprintf(srchkey, 10, "S%d ", i);
void findk_by_stroke(int stroke, int plusmin, struct knode **llist) {  static char srchkey[10];  int i, lowerlim, upperlim;   upperlim = stroke + plusmin;  if (upperlim > 30) upperlim = 30;  lowerlim = stroke - plusmin;  if (lowerlim < 1) lowerlim = 1;   for (i = lowerlim; i <= upperlim ; i++) {    sprintf(srchkey,"S%d ", i);    findk_by_key(srchkey, llist);  }}