Getting error in sockt programming pls help

Question

i got these 4 warning while i compile my first socket program in windows VC++..
anyone plz helpp me...
Compiling...
server.c
c:\windows\desktop\prasad\socket\server.c(28) : warning C4013: 'bzero' undefined; assuming extern returning int
c:\windows\desktop\prasad\socket\server.c(44) : warning C4013: 'read' undefined; assuming extern returning int
c:\windows\desktop\prasad\socket\server.c(47) : warning C4013: 'write' undefined; assuming extern returning int
c:\windows\desktop\prasad\socket\server.c(32) : warning C4761: integral size mismatch in argument; conversion supplied
server.obj - 0 error(s), 4 warning(s)

Answer 1

i have two program server and client..first i compile this server.c file only....
pls help n im jus a bigner
this is the "server.c"
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/in.h>
void error(char *msg)
perror(msg);
exit(1);
int main(int argc, char *argv[])
int sockfd, newsockfd, portno, clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n;
if (argc < 2) {
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
error("ERROR on binding");
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd,
(struct sockaddr *) &cli_addr,
&clilen);
if (newsockfd < 0)
error("ERROR on accept");
bzero(buffer,256);
n = read(newsockfd,buffer,255);
if (n < 0) error("ERROR reading from socket");
printf("Here is the message: %s\n",buffer);
n = write(newsockfd,"I got your message",18);
if (n < 0) error("ERROR writing to socket");
return 0;
}