Hello World client in Objective-C

//
// Hello World client
// Connects REQ socket to tcp://localhost:5555
// Sends "Hello" to server, expects "World" back
//

#import "ZMQObjC.h"

int
main (void)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
ZMQContext *ctx = [[[ZMQContext alloc] initWithIOThreads:1U] autorelease];

/* Get a socket to talk to clients. */
NSLog(@"Connecting to hello world server…");
static NSString *const kEndpoint = @"tcp://localhost:5555";
ZMQSocket *requester = [ctx socketWithType:ZMQ_REQ];
BOOL didBind = [requester connectToEndpoint:kEndpoint];
if (!didBind) {
NSLog(@"*** Failed to bind to endpoint [%@].", kEndpoint);
return EXIT_FAILURE;
}

static const int kMaxRequest = 10;
NSData *const request = [@"Hello" dataUsingEncoding:NSUTF8StringEncoding];
for (int request_nbr = 0; request_nbr < kMaxRequest; ++request_nbr) {
NSAutoreleasePool *localPool = [[NSAutoreleasePool alloc] init];

NSLog(@"Sending request %d.", request_nbr);
[requester sendData:request withFlags:0];
NSData *reply = [requester receiveDataWithFlags:0];
NSString *text = [[[NSString alloc]
initWithData:reply encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"Received reply %d: %@", request_nbr, text);

[localPool drain];
}

[requester close];
[pool drain];
return EXIT_SUCCESS;
}