How to send a double value in socket programming

Expand Post »

Hi all,
im new to this.....
i want to send a doube to client...so im convt that to char and sendg that...it prits d exact value in server, but in client it doesnt print the decimal value... it just display like '123.'
my code looks like....

C Syntax (Toggle Plain Text)
	struct sockaddr_in server; 
	struct sockaddr_in client; 
	int sockfd,sockfd2,sockfd3, n_bytes; 
 
	double a=123.456;
             char msg1[3];
	sprintf(msg1,"%g",a);    	
 
	printf("\n msg1 = %s ",msg1);
//here it prints msg1=123.456 	  
	if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{ 
		printf("Socket error..."); 
		return 0; 
	} 
 
	server.sin_addr.s_addr=INADDR_ANY;  
	server.sin_port=htons(PORT);  
	server.sin_family=AF_INET; 
 
	send(sockfd2,msg1,sizeof(msg1),0);
	struct sockaddr_in server; 
	struct sockaddr_in client; 
	int sockfd,sockfd2,sockfd3, n_bytes; 

	double a=123.456;
             char msg1[3];
	sprintf(msg1,"%g",a);    	
	    
	printf("\n msg1 = %s ",msg1);
//here it prints msg1=123.456 	  
	if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{ 
		printf("Socket error..."); 
		return 0; 
	} 

	server.sin_addr.s_addr=INADDR_ANY;  
	server.sin_port=htons(PORT);  
	server.sin_family=AF_INET; 
 
	send(sockfd2,msg1,sizeof(msg1),0);

<< moderator edit: added [code][/code] tags >>

Similar Threads

Problem with Client-Server Socket Connection in Java
About socket programming in php in PHP
Socket Programming... in C#
How to send messages in C++ in C++
C++ socket programming in C++

skprasat

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

13 posts
since May 2005

Permalink

May 27th, 2005

Re: How to send a double value in socket programming

Hello,

Moving to the C++ section for technical support / suggestion....

kc0arf

Team Colleague

Reputation Points: 121

Solved Threads: 57

Posting Virtuoso

Offline

1,629 posts
since Mar 2004

Permalink

May 27th, 2005

Re: How to send a double value in socket programming

C Syntax (Toggle Plain Text)
	double a=123.456;
             char msg1[3];
	sprintf(msg1,"%g",a);
	double a=123.456;
             char msg1[3];
	sprintf(msg1,"%g",a);

The string msg1 only has room for 2 characters and a terminating null. And you're trying to write 7 characters plus the null to it.

(Toggle Plain Text)

send(sockfd2,msg1,sizeof(msg1),0);

You might mean strlen(msg1).

Dave Sinkula

Team Colleague

Reputation Points: 2780

Solved Threads: 312

long time no c

Offline

4,790 posts
since Apr 2004

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in C Forum Timeline: how to find all the drives on a computer?

Next Thread in C Forum Timeline: Implement "Whats This" using Win32

DaniWeb Message

Cancel Changes

User Name
Password