Socket programming in c - c

Question

I want to ask how the server file in c is contact with client file in socket programming in c?
when I run the server file it stops at listen() function and wait..
when I run the client file it makes the server file to continue running and move to accept function in server file.
but I don't know how the two files communicatee with each other?
This is the two files Server.c and Client.c
Server.c
`
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_DEPRECATE
#pragma comment(lib,"Ws2_32.lib")
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include<sys/types.h>
#include<sys/stat.h>
#include <sys/types.h>
#include <winsock2.h>
#include <fcntl.h>
#include <io.h>
#include <Ws2tcpip.h>
#include <InetReg.h>
#define PORT 9909
struct sockaddr_in sockAddress;
struct sockaddr_in clientAddress;
int main() {
int socketfd ;
struct addrinfo hints;
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
printf("Failed intialize wsa\n");
else
printf("Success intialize wsa\n");
//Create socket
socketfd = socket(AF_INET,SOCK_STREAM,0);
if (socketfd == -1)
printf("fails socket creation");
else
printf("Succness socket creation");
//intailize address of sockaddress
memset(&sockAddress, 0, sizeof(sockAddress));
sockAddress.sin_family = AF_INET;
sockAddress.sin_port = htons(PORT);
sockAddress.sin_addr.s_addr = htonl(INADDR_ANY);
//Bind the socket to local port
int bindfd = bind(socketfd, (struct sockaddr*)&sockAddress,sizeof(sockAddress));
if (bindfd == -1)
printf("Fail Binding socket to local port\n");
else
printf("Success Binding socket to local port\n");
//listen the request from client
int listenfd = listen(socketfd, 1); //return 0 means success
if (listenfd != 0)
printf("Fail listening\n");
else
printf("start listening to local port\n");
//accepting
memset(&clientAddress, 0, sizeof(clientAddress));
int clientAddressLength=sizeof(clientAddress);
int clientSocketfd = accept(socketfd,(struct sockaddr*)&clientAddress,&clientAddressLength);
if (clientSocketfd == -1)
printf("failed to accept");
else
printf("Accepted...");
//Writing
char msg[100] = "Hello my name is ahmed server";
unsigned int i = sizeof(msg);
//_write(socketfd,msg,i);
send(clientSocketfd, msg, sizeof(msg), true);
//printf("sent: %s\n", msg);
printf("\n\n\nServer address: %d\n\n\n", sockAddress.sin_addr.s_addr);
printf("ServerAddress: %d\n", clientSocketfd);
//close
closesocket(clientSocketfd);
closesocket(socketfd);
system("pause");
return 0;
}
`
Client.c
#define _CRT_SECURE_NO_DEPRECATE
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#pragma comment(lib,"Ws2_32.lib")
#include <stdio.h>
#include <winsock2.h>
#define PORT 9909
struct sockaddr_in SocketAddress;
int main() {
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
printf("Failed intialize wsa\n");
else
printf("Success intialize wsa\n");
//intialize socket
int SocketFd = socket(AF_INET,SOCK_STREAM,0);
if (SocketFd == -1)
printf("Failed intialize socket\n");
else
printf("Success intialize socket\n");
//intialize socket address
memset(&SocketAddress,0,sizeof(SocketAddress));
SocketAddress.sin_family = AF_INET;
SocketAddress.sin_port = htons(PORT);
SocketAddress.sin_addr.s_addr = inet_addr("127.0.0.1");
//connectivity
int c = connect(SocketFd,(struct sockaddr*)&SocketAddress,sizeof(SocketAddress));
printf("client: %d", SocketFd);
printf("\n\n\nClient address: %d\n\n\n", SocketAddress.sin_addr.s_addr);
return 0;
}