make one string from 2 strings.

Ali.B · 08-12-2009, 04:08 AM

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

Code:

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

with this pair of code ( with help of this forum

):

Code:

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:

Code:

x-coord: 00500
y-coord: 11611

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

Code:

"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 · 08-12-2009, 07:39 AM

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

Ali.B · 08-12-2009, 07:44 AM

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

Dino · 08-12-2009, 07:47 AM

Code:

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 · 08-12-2009, 08:21 AM

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 · 08-12-2009, 08:25 AM

Quote:

Originally Posted by 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:

Code:

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:

Code:

bt_msg= X=00500Y=11611

thanks Dino for ur help

Dino · 08-12-2009, 08:43 AM

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

Ali.B · 08-12-2009, 10:04 AM

Exactly....

08-12-2009, 04:08 AM	#1
Ali.B Registered User Join Date: Jan 2009 Posts: 37	make one string from 2 strings. hello i managed to parse the parts that i need from this string: Code: "GET /send.htm?Text=START+00500+11611 HTTP/1.1" with this pair of code ( with help of this forum ): Code: 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: Code: x-coord: 00500 y-coord: 11611 i need to assemble a payload that follows the following structure: Code: "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 Last edited by Ali.B; 08-12-2009 at 04:30 AM.
Ali.B is offline

08-12-2009, 07:39 AM	#2
Dino Jack of many languages Join Date: Nov 2007 Location: Katy, Texas Posts: 1,929	sprintf() is probably what you want to use, or, you can use a series of strcat() functions. __________________ Mac and Windows cross platform programmer. Ruby lover. Memorable Quotes From Recent Posts: I can't remember.
Dino is offline

08-12-2009, 07:44 AM	#3
Ali.B Registered User Join Date: Jan 2009 Posts: 37	could u show me how with a piece of code? with both functions; sprintf() and strcat();
Ali.B is offline

08-12-2009, 07:47 AM	#4
Dino Jack of many languages Join Date: Nov 2007 Location: Katy, Texas Posts: 1,929	Code: 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) ; __________________ Mac and Windows cross platform programmer. Ruby lover. Memorable Quotes From Recent Posts: I can't remember.
Dino is offline

08-12-2009, 08:21 AM	#5
Ali.B Registered User Join Date: Jan 2009 Posts: 37	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 is offline

08-12-2009, 08:43 AM	#7
Dino Jack of many languages Join Date: Nov 2007 Location: Katy, Texas Posts: 1,929	Glad you figured it out. That's what it's all about - you learning through experimentation and trial and error. __________________ Mac and Windows cross platform programmer. Ruby lover. Memorable Quotes From Recent Posts: I can't remember.
Dino is offline

08-12-2009, 10:04 AM	#8
Ali.B Registered User Join Date: Jan 2009 Posts: 37	Exactly....
Ali.B is offline

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