connect to redis by hiredis

redis_connect.c

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

/**
 * gcc -I/usr/local/include -L/usr/local/lib -lhiredis -Wall -o connect connect.c
 */

void redisDisconnect(redisContext *ctx) {
    close(ctx->fd);
    redisFree(ctx);
}

void displayRedisReply(redisReply *reply) {
    switch (reply->type) {
        case REDIS_REPLY_STATUS:
            printf("type: REDIS_REPLY_STATUS\n");
            printf("length: %d. str: %s\n", reply->len, reply->str);
            break;
        case REDIS_REPLY_ERROR:
            printf("type: REDIS_REPLY_ERROR\n");
            break;
        case REDIS_REPLY_INTEGER:
            printf("type: REDIS_REPLY_INTEGER\n");
            break;
        case REDIS_REPLY_NIL:
            printf("type: REDIS_REPLY_NIL\n");
            break;
        case REDIS_REPLY_STRING:
            printf("type: REDIS_REPLY_STRING\n");
            break;
        case REDIS_REPLY_ARRAY:
            printf("type: REDIS_REPLY_ARRAY\n");
            break;
        default:
            break;
    }
}

int main(int argc, char *argv[]) {
    redisContext *ctx;
    redisReply *reply;

    ctx = redisConnect("127.0.0.1", 6379);

    if (ctx->err) {
        printf("Error: %s\n", ctx->errstr);
        exit(-1);
    }

    reply = redisCommand(ctx, "PING");
    displayRedisReply(reply);
    freeReplyObject(reply);

    reply = redisCommand(ctx, "SET foo %s", "bar");
    displayRedisReply(reply);
    freeReplyObject(reply);

    reply = redisCommand(ctx, "GET %s", "foo");
    displayRedisReply(reply);
    freeReplyObject(reply);

    redisDisconnect(ctx);

    exit(0);
}

Is it correct code? In MS VS I have access violation at 19th line, when I try to get string and length from object reply. In debug reply->str and reply->len have correct varibales.