Programming

#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>

int main()
{
        char buf[20]="Hai";
        char buffer[20];
        int conarr[20],con=0,i,r,count,new_fd,sockfd;
        socklen_t sin_size;
        struct sockaddr_storage their_addr;
        unsigned int sock,connect,len,child_pid,sd;
        struct sockaddr_in servaddr,cliaddr;
        sock=socket(AF_INET,SOCK_STREAM,0);
        sd = socket(AF_INET,SOCK_STREAM,0);
        servaddr.sin_family=AF_INET;
        servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
        servaddr.sin_port=htons(4005);
        bind(sock,(struct sockaddr*)&servaddr,sizeof(servaddr));
        listen(sock,5);
        len=sizeof(struct sockaddr_in);
        while(1)
        {
                if((connect=accept(sock,(struct sockaddr*)&cliaddr,&len))>0)
                {
                        printf("\nENTER\n");
                        con++;
                        printf("con %d",con);
                        conarr[con]=connect;
                        for(i=1;i<=con;i++)
                        {
                         write(conarr[i],buf,sizeof(buf));
                         
                        }
                   }
          }
        char op[2];
        FILE *f;
        char pass[100];
    //char i;
        new_fd = accept(sockfd, (struct sockaddr *) &their_addr, &sin_size);
        sin_size = sizeof their_addr;
    printf("\n hello");
    f = fopen("file.txt", "r");

    while (fgets(pass, 100, f) != NULL)
        count++;
    op[0] = count + 48;
    op[1] = '\0';
    printf("no of lines:%s", op);
    if ((send(new_fd, op, sizeof op, 0)) == -1)
        perror("re");
    fseek(f, 0, SEEK_SET);
    count = 0;
    while (fgets(pass, 100, f) != NULL) 
        {
        if ((send(new_fd, pass, 100, 0)) == -1)
        perror("l");
    }

    fclose(f);
}

 #include<string.h>
 #include<sys/socket.h>
 #include<netinet/in.h>
 #include<arpa/inet.h>
 #include<stdio.h>
 #include<netdb.h>
 #include<stdlib.h>
 int main()
 {
         struct sockaddr_in serv;
         struct addrinfo hints;
         int r,sd,nsd,f,w,c,s,snd,lis;
         char buffer[12]="hello world\n",buff[100]="YES";
         char buf[100];
         sd = socket(AF_INET,SOCK_STREAM,0);
         printf("Socket descriptor:_%d_\n",sd);
         serv.sin_family=AF_INET;
         serv.sin_addr.s_addr=inet_addr("10.142.17.123");
         serv.sin_port=htons(4005);
         s=sizeof(serv);
         c=connect(sd,(void *)&serv,s);
         if(c==0)
            printf("%d_connected_%s",c,buffer);
         else
          {
            printf("%d_%d_Error in connection\n",c,s);
            exit(1);
           }
         while(1)
         {
          r = read(sd,buffer,sizeof(buffer));
          if(r>0)
          {
          printf("Server Says :%s\n",buffer);
          printf("\n...");
          w = write(sd,buffer,sizeof(buffer));
          printf("\nSay yes...");

          break;
          }

         }
        int count = 0;
    if ((recv(sd, buf, sizeof buf, 0)) == -1)
        perror("p");
    printf("\n The no of lines in file is %s", buf);
    count = atoi(buf);
    while (count != 0) 
        {
        if ((recv(sd, buff, sizeof buff, 0)) == -1)
            perror("k");
        printf("\n%s", buff);
        count--;
    }
 }