make one string from 2 strings.

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

Code:

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

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

Code:

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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);
}

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so basically:
the output will be:

Code:

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x-coord: 00500
y-coord: 11611

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

Code:

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"X=00500Y=11611"

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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 :)

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

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

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) ;

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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?

Quote:

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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?

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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) ;

       
}

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and the output is as i wanted:

Code:

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bt_msg= X=00500Y=11611

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thanks Dino for ur help ;)

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

Exactly....