static/chunks/766-12dbb05e2adf85ab.js","4150","static/chunks/app/courses/%5BcourseSlug%5D/lessons/%5BunitSlug%5D/page-1fc213a0f4568bd8.js"],"Image"] 3b:T6bc,#include #include int main() { // Connect to Redis redisContext* context = redisConnect("127.0.0.1", 6379); if (context == nullptr || context->err) { if (context) { std::cerr << "Error: " << context->errstr << std::endl; redisFree(context); } else { std::cerr << "Can't allocate redis context" << std::endl; } return 1; } // Add scores to the leaderboard redisCommand(context, "ZADD leaderboard 100 user1"); redisCommand(context, "ZADD leaderboard 200 user2"); redisCommand(context, "ZADD leaderboard 150 user3"); // Retrieve the leaderboard redisReply* reply = (redisReply*) redisCommand(context, "ZREVRANGE leaderboard 0 2 WITHSCORES"); if (reply->type == REDIS_REPLY_ARRAY) { for (size_t i = 0; i < reply->elements; i += 2) { std::cout << reply->element[i]->str << ": " << reply->element[i+1]->str << std::endl; } } freeReplyObject(reply); // Output: // user2: 200 // user3: 150 // user1: 100 // Get rank and score of user3 reply = (redisReply*) redisCommand(context, "ZREVRANK leaderboard user3"); if (reply->type == REDIS_REPLY_INTEGER) { std::cout << "Rank of user3: " << reply->integer << std::endl; } freeReplyObject(reply); // Output: // Rank of user3: 1 reply = (redisReply*) redisCommand(context, "ZSCORE leaderboard user3"); if (reply->type == REDIS_REPLY_STRING) { std::cout << "Score of user3: " << reply->str << std::endl; } freeReplyObject(reply); // Output: // Score of user3: 150 // Clean up redisFree(context); return 0; }