mongodb remove all from collection

To remove all documents from a MongoDB collection in C, you can use the mongo_collection_remove function with an empty query document. Here's an example:

#include <mongo.h>

int main() {
    mongo conn;
    mongo_init(&conn);
    mongo_connect(&conn, "localhost", 27017);

    mongo_remove(&conn, "database.collection", NULL, MONGO_SINGLE_REMOVE);

    mongo_destroy(&conn);
    return 0;
}

This code snippet connects to a MongoDB server running on localhost at port 27017. It then removes all documents from the collection in the database. The NULL parameter passed as the query document matches all documents in the collection. The MONGO_SINGLE_REMOVE flag specifies that only one document should be removed at a time.

Remember to replace "database.collection" with the actual name of your database and collection. You should also handle any errors that may occur during the connection and removal process.