Function callback

test/sqlite/benchmark.c:17–25

int print = 1;

static int callback(void *NotUsed, int argc, char **argv, char **azColName){
  int i;
  if (!print) return 0;
  for(i=0; i<argc; i++){
    printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
  }
  printf("\n");
  return 0;
}

int test(){
  sqlite3 *db;