SRL Archive - C/C++ Help and Tutorials

Oh, and strings!

Yes. I'm quite confused about all the different char data types in C++.

I'm also trying to figure out (through trial-and-error, mostly) how to use strings and chars at the same time. Er… That doesn't really make sense, does it?

    string temp = "POST /ResultEJ.aspx HTTP/1.1\r\n";
    temp += "Host: www.englishjapaneseonlinedictionary.com\r\n";
    temp += "Content-Type: application/x-www-form-urlencoded\r\n";
    temp += "Content-Length: "; temp.append((const char*)strlen(argv[0])); temp += "\r\n\r\n";
    temp += "search="; temp.append(argv[0]); temp += "\r\n";

Line four messes up, and spits:

Segmentation fault (core dumped)

Out into the terminal.

I'm sure I'm messing something up here. I just don't know what.

Could someone lend a hand?

And regarding the subject line…

What do all the asterisks in different places do? And why can't you initialize a char *var like this?:

char *msg = "Hewwo!" + "Goodbye!";

Thanks for reading. Please see what you can do,

-Mike

strln(argv[0])….

Trying to get the string length of a character?


Or… it could be you are trying to convert it into a const. Just try (string) or (char*)


And, about the asterisks:

char* var {is equal to} char * var {is equal to} char *var

And the reason you can't initialize a char* like that is because, well, you need to give it a length.

char *var[15];

var = strcpy(var, "Hewwo!" + " Goodbye!";

They're all the same? Well that clears up a lot :)

And I am trying to get the length of the search query.

With a POST request, you have to provide the length of the post variables. (Eg., var1=hello would be 10. Likewise, var1=hello&var2=goodbye would be 23. You have to include everything.)

Which just reminds me, that won't work right. You have to include "search=" in with the number given.

Wait.. Why can't you just do this on the browser side? Handling the search request… Or are you sending it from the application?

Wait.. Why can't you just do this on the browser side? Handling the search request… Or are you sending it from the application?

Sending it from the application.

Ah, I see.


I'm pretty sure that there are libraries for this sort of thing…

*Holds up Vampire cross with some garlic attached*

Libraries… Me no like libraries!

From: Jason2gs
Libraries… Me no like libraries!

How to steal code

Hey - that sounds like communism! :p

From: Yakman
How to steal code

*Pushes glasses up on nose*

Haha… Cool :)

Hm… I bet I can borrow some of the source code from the POST script…

humm, sounds like you need a stringstream… works just like a cout (or cin if you want it to) statement only it stores whatever you want. Foe example.

#include <ssteam>
using namespace std;

int main()
{
   ostringstream in;
   char test[] = "test";
   int number = 7;
   double pi = 3.14;
   ostringstream << test << " number: " << number << " Pi: " << pi:
   cout << ostringstream.str() << endl; 
}

Output should be
test number: 7 Pi: 3.14
string streams are nice, love them.