Notes

SERVER
#include<stdio.h>
#include<stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int sockfd;
struct sockaddr_in server,client;


sockfd=socket(AF_INET,SOCK_DGRAM,0);
if(sockfd==-1)
{
printf("Socket not createdn");
exit(0);
}
else
{
printf("Socket Createdn");
}

server.sin_family=AF_INET;
server.sin_port=htons(3050);
server.sin_addr.s_addr=INADDR_ANY;

// inet_addr("127.0.0.1")
// ipconfig in terminal to find your ip address

int x= bind(sockfd,(struct sockaddr *)&server,sizeof(server));

if(x==-1){
printf("Bind Failuren");
exit(0);
}
else
{
printf("Bind Successfuln");
}
int a,b,lcm;
int s=sizeof(client);
recvfrom(sockfd,&a,100,0,(struct sockaddr *)&client,&s);
printf("Recieved message is %dn",a);
recvfrom(sockfd,&b,100,0,(struct sockaddr *)&client,&s);
printf("Recieved message is %dn",b);
int max_Value = (a>b)?a:b;
while(1)
{
if(max_Value % a== 0 && max_Value %b == 0)
{
lcm=max_Value;
break;
}
++max_Value;
}
printf("lcm is %dn",lcm);

sendto(sockfd,&lcm,4,0,(struct sockaddr *)&client,sizeof(client));
close(sockfd);

return 0;
}
CLIENT

#include<stdio.h>
#include<stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int sockfd;
struct sockaddr_in server;

sockfd=socket(AF_INET,SOCK_DGRAM,0);
if(sockfd==-1)
{
printf("Socket not createdn");
exit(0);
}
else
{
printf("Socket Createdn");
}

server.sin_family=AF_INET;
server.sin_port=htons(3050);
server.sin_addr.s_addr=INADDR_ANY;
int a,b;
printf("nEnter first number = ");
scanf("%d",&a);
sendto(sockfd,&a,4,0,(struct sockaddr *)&server,sizeof(server));

printf("nEnter second number = ");
scanf("%d",&b);
sendto(sockfd,&b,4,0,(struct sockaddr *)&server,sizeof(server));

int rec;
int s=sizeof(server);
recvfrom(sockfd,&rec,4,0,(struct sockaddr *)&server,&s);

printf("Recieved message lcm is %dn",rec);
close(sockfd);

return 0;
}

SERVER
#include<stdio.h>
#include<stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int sockfd;
struct sockaddr_in server,client;


sockfd=socket(AF_INET,SOCK_DGRAM,0);
if(sockfd==-1)
{
printf("Socket not createdn");
exit(0);
}
else
{
printf("Socket Createdn");
}

server.sin_family=AF_INET;
server.sin_port=htons(3050);
server.sin_addr.s_addr=INADDR_ANY;

// inet_addr("127.0.0.1")
// ipconfig in terminal to find your ip address

int x= bind(sockfd,(struct sockaddr *)&server,sizeof(server));

if(x==-1){
printf("Bind Failuren");
exit(0);
}
else
{
printf("Bind Successfuln");
}
int a,n;
int s=sizeof(client);
recvfrom(sockfd,&a,100,0,(struct sockaddr *)&client,&s);
printf("Recieved message is %dn",a);

while(a!=0)
{
int d=a%10;
if(d%2==0)
n=n*10+d;
a=a/10;
}

sendto(sockfd,&n,4,0,(struct sockaddr *)&client,sizeof(client));
close(sockfd);

return 0;
}
CLIENT

#include<stdio.h>
#include<stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int sockfd;
struct sockaddr_in server;

sockfd=socket(AF_INET,SOCK_DGRAM,0);
if(sockfd==-1)
{
printf("Socket not createdn");
exit(0);
}
else
{
printf("Socket Createdn");
}

server.sin_family=AF_INET;
server.sin_port=htons(3050);
server.sin_addr.s_addr=INADDR_ANY;
int a,b;
printf("nEnter first number = ");
scanf("%d",&a);
sendto(sockfd,&a,4,0,(struct sockaddr *)&server,sizeof(server));


int rec;
int s=sizeof(server);
recvfrom(sockfd,&rec,4,0,(struct sockaddr *)&server,&s);

printf("Recieved message his %dn",rec);
close(sockfd);

return 0;
}