#include#include // Berkeley DB library using namespace std; int main() { Db mydb(0, 0); mydb.open(NULL, "example.db", NULL, DB_BTREE, DB_CREATE, 0); Dbt key((char*)"example_key", strlen("example_key")+1); Dbt value; mydb.get(NULL, &key, &value, 0); cout << (char*)value.get_data() << endl; mydb.close(0); }
#includeIn this example, we are using a string variable for the key instead of creating a Dbt object. We pass in the pointer to the string data, the size of the string, and the value Dbt object to the c_get function. We then print out the value associated with the key. Package Library: The cpp DBC c_get function is part of the Berkeley DB library.#include // Berkeley DB library using namespace std; int main() { Db mydb(0, 0); mydb.open(NULL, "example.db", NULL, DB_BTREE, DB_CREATE, 0); string key = "example_key"; Dbt value; mydb.get(NULL, (void*)key.c_str(), key.size(), &value, 0); cout << (char*)value.get_data() << endl; mydb.close(0); }