can anyone help me?

I'm trying to write a simple TCP client that is able to connect to a server and send and receive messages and commands.
The server is suppose to understand these commands:

AD perform a simple addition
SB perform a simple subtraction
DIV perform a simple division
MUL perform a simple multiplication
IDENT identify the client and itself
QUIT break the current connection and wait for a new one

This is what I got, but there are problems in it. please would anyone have a look and help me out? thank you.

Code:

#include<stdio.h>
#include<String.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>
#include<arpa/inet.h>

#define MSGSIZE 64/*size of message buffers*/
#define PORT 3550/*server port number*/

main(int args,char*argv[]){
	char sendbuf[MSGSIZE];/*send character buffer*/
	char recvbuf[MSGSIZE];/*recive character buffer*/
	Struct sockaddr_in server;/*internet domain server*/
	int sockket;/*socket descriptor*/
	int status;/*socket status*/
	int numbytes;/*number of bytes of message*/

if(argc!=2){
printf("Usage:%s<IP Address>\n",argv[0]);
exit(-1);
}




/*Server details */
server.sin_family=AF_INET;
Server.sin_addr.s_addr=inet_addr(argv[1]);
servsr.sin_port=htons(PORT);

Printf("valid IP address,connecting to....%s\n",argv[1]);

/*connet to server*/
if (status=connect(socket,(struct sockaddr*)&server,sizeof (server))<0){
close(socket);
perror("connect");
exit(1);
}

/*recieve message from server*/

if (numbytes=recv(socket,recvbuf,sizeof(recvbuf),0)<0){
perror("recv");
exit(1);
}

/*print response from server*/
recvbuf[numbytes]='\0';
printf("%s\n\n",recvbuf);

/*Being main loop */
for(; ;){
printf("Input a command(AD,SB,DIV,MUL,IDENT,QUIT)\n");

/*get command from user*/
 get(sendbuf);
/*send command to server*/
status=send(sock,sendbuf,sizeof(sendbuf),0);
if (status<0){
perror("send");
exit(1);
}

/*recieve message from server*/
numbytes=recv(socket,recvbuf,sizeof(recvbuf),0);
if(states<0){
perror("send");
exit(1);
}

/*Print response frpm server*/
recvbuf[numbytes]='\0';
printf("%s\n\n",recvbuf);

if[strncmp(sendbuf,"QUIT",4)==0){
break;
}

}


close(socket);
printf("connection closed....\n");

return 0;
}

I dunno which is your bigger problem - whether it's how to use sockets, or simple problems of broken 'C' syntax

> Printf("valid IP address,connecting to....%s\n",argv[1]);
C is case sensitive Printf != printf

> if[strncmp(sendbuf,"QUIT",4)==0)
What's with the square bracket?

I suggest you first get the read a command loop sorted out before you try and send/recv it to another process

Code:

while ( fgets( buff, sizeof buff, stdin ) != NULL ) {
    if ( strncmp( buff, "QUIT", 4 ) == 0 ) break;
    printf( "%s", buff );
}

When you've done that, read
Useful Links And Good Books

I highly recommend Network Programming for Microsoft Windows, Second Edition by Anthony Jones and Jim Ohmund.

Check out this FAQ.

http://www.tangentsoft.net/wskfaq/

Kuphryn