I wanna create client. c for socket programming but when I compile the code I encountered a problem. And I use codeblocks for ide.What's wrong?

Errors:
codeBlocks\SocketProgram\main.c|35|undefined reference to `WSAStartup@8'|
codeBlocks\SocketProgram\main.c|48|undefined reference to `htons@4'|
codeBlocks\SocketProgram\main.c|63|undefined reference to `gethostbyname@4'|
codeBlocks\SocketProgram\main.c|71|undefined reference to `getprotobyname@4'|

client.c
Code:
#ifndef unix
#define WIN32
#include <windows.h>
#include <winsock.h>
#else
#define closesocket close
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif

#include <stdio.h>
#include <stdlib.h>

#define PROTOPORT  5555;    /*Default protocol port */
extern int  errno;
char localhost[]="localhost";    /*default localhost name */

main(argc, argv)
int argc;
char *argv[];
{
    struct hostent *ptrh;
    struct protoent *ptrp;
    struct sockaddr_in sad;
    int sd;
    int port;
    char *host;
    int n;
    char buf[1000];
#ifdef WIN32
    WSADATA wsaData;
    WSAStartup(0x0101,&wsaData);
#endif
    memset((char*)&sad,0,sizeof(sad)); /* clear sockaddr structure*/
    sad.sin_family =AF_INET;

    if(argc>2)
    {
        port=atoi(argv[2]);
    }
    else{
    port=PROTOPORT;
    }
    if(port>0)
        sad.sin_port=htons((u_short)port);
    else
    {
        fprintf(stderr,"*bad port number %s\n",argv[2]);
        exit(1);
    }
    if(argc>1)
    {
        host=argv[1];
    }
    else {
    host=localhost;
    }
    /*convert host name to equivalent ip address and copy to sad */

    ptrh=gethostbyname(host);
    if(((char*)ptrh)==NULL)
    {
        fprintf(stderr,"invalid host: %s\n",host);
        exit(1);
    }
    memcpy(&sad.sin_addr,ptrh->h_addr,ptrh->h_length);

    if(((int)(ptrp=getprotobyname("tcp")))==0)
    {
        fprintf(stderr,"cannot map \"tcp\"to protocol number");
        exit(1);

    }
    /*Create a socket*/
    sd=socket(PF_INET,SOCK_STREAM,ptrp->p_proto);
    if(sd<0)
    {
    fprintf(stderr,"socket creation failed");
    exit(1);
    }
    if(connect(sd,(struct sockaddr *)&sad,sizeof(sad))<0)
    {
    fprintf(stderr,"connection failed\n");
    exit(1);
    }
    n=recv(sd,buf,sizeof(buf),0);
    while(n>0)
    {
        write(1,buf,n);
        n=recv(sd,buf,sizeof(buf),0);
    }
    closesocket(sd);
    exit(0);
    }