写一段redis zset获取排名的代码

以下是获取 Redis Zset 排名的代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <hiredis/hiredis.h>

int main(int argc, char **argv) {
    redisContext *c = redisConnect("127...1", 6379);
    if (c == NULL || c->err) {
        printf("Error connecting to Redis: %s\n", c->errstr);
        exit(1);
    }

    const char *key = "myzset";
    const char *member = "member1";

    redisReply *reply = redisCommand(c, "ZREVRANK %s %s", key, member);
    if (reply == NULL) {
        printf("Error executing Redis command: %s\n", c->errstr);
        exit(1);
    }

    if (reply->type == REDIS_REPLY_ERROR) {
        printf("Redis error: %s\n", reply->str);
        exit(1);
    }

    if (reply->type == REDIS_REPLY_NIL) {
        printf("Member not found in Zset\n");
    } else {
        printf("Rank of member %s in Zset %s is %lld\n", member, key, reply->integer);
    }

    freeReplyObject(reply);
    redisFree(c);

    return ;
}

以上代码使用 hiredis 库连接 Redis，然后执行 `ZREVRANK` 命令获取指定成员在有序集合中的排名。如果成员不存在，则返回 `REDIS_REPLY_NIL`。