make one string from 2 strings.

[Ali.B]

hello
i managed to parse the parts that i need from this string:

"GET /send.htm?Text=START+00500+11611 HTTP/1.1"

with this pair of code ( with help of this forum ):

char Text[80] = {0};
	char * line = "GET /send.htm?Text=START+00500+11611 HTTP/1.1";
	char *s,*t;
	char bt_msg[20] = {0};

	if(s = strchr(line, '+')) 
	{
		if(t = strchr(s, ' '))
			strncpy(Text, s+1, t-s);
	}


	char *xcoord=strtok(Text,"+"), *ycoord=strtok(NULL,"+");
	printf("x-coord:%s\n", xcoord);
	printf("y-coord:%s\n", ycoord);
}

so basically:
the output will be:

x-coord: 00500
y-coord: 11611

i need to assemble a payload that follows the following structure:

"X=00500Y=11611"

than means the first five digits represent the x-coord and the 2nd five digits represent y-coord.
i need to save assemble this payload from those coordinates and put in a variable so i can use it later on.may be save it as bt_msg. how could i do it?
thanks

[Dino]

sprintf() is probably what you want to use, or, you can use a series of strcat() functions.

[Ali.B]

could u show me how with a piece of code? with both functions; sprintf() and strcat();

[Dino]

char a[] = "A" ; 
char b[] = "B" ; 
char c[] = "C" ; 
char abc[10]  = {0} ; 

strcat(abc, a) ; 
strcat(abc, b) ; 
strcat(abc, c) ; 

printf("variable abc = %s\n", abc) ;

[Ali.B]

yes i understood this part... and I can use it now... thanks for the sample code
the output will be this; since my variables are xcoord and ycoord;
0050011611
now how can i add other characters to this string? and make it look like this:
X=00500Y=11611
X,= and Y should be added to the string.. how can i handle this?

[Ali.B]

yes i understood this part... and I can use it now... thanks for the sample code
the output will be this; since my variables are xcoord and ycoord;
0050011611
now how can i add other characters to this string? and make it look like this:
X=00500Y=11611
X,= and Y should be added to the string.. how can i handle this?

nvm... i figured it out by playing the peice of code u Dino gave me
i did like this:

int main()
{
	char Text[80] = {0};
	char * line = "GET /send.htm?Text=START+00500+11611 HTTP/1.1";
	char *s,*t;
	char bt_msg[20] = {0};

	if(s = strchr(line, '+')) 
	{
		if(t = strchr(s, ' '))
			strncpy(Text, s+1, t-s);
	}

	char *xcoord=strtok(Text,"+"), *ycoord=strtok(NULL,"+");
	printf("x-coord:%s\n", xcoord);
	printf("y-coord:%s\n", ycoord);
	
	strcat(bt_msg, "X=");
	strcat(bt_msg, xcoord);
	strcat(bt_msg, "Y="); 
	strcat(bt_msg, ycoord); 
		
	printf("bt_msg= %s\n", bt_msg) ;

	
}

and the output is as i wanted:

bt_msg= X=00500Y=11611

thanks Dino for ur help

[Dino]

Glad you figured it out. That's what it's all about - you learning through experimentation and trial and error.

[Ali.B]

Exactly....