Programming Forums > Application Development > C++

Brent · May 20th, 2006, 11:59 AM

i was wondering how i would break this down into three 2 parts:

www.mysite.com/post.cgi&post=data

i want to be able to take 'data' from the rest of the string and use it.

i am using open watcom compiler on windows xp

brent

DaWei · May 20th, 2006, 12:36 PM

What is a "three 2 part"? In the absence of a clear question, I would say find the "=" and take everything beyond. (Polishes loaner ball bearing while crystal is in the shop.)

Jessehk · May 20th, 2006, 1:55 PM

I wrote a split function to do this very thing. Enjoy

(Toggle Plain Text)

//split takes a string of words and returns a vector of words, seperated
//by a character specificed in "splitPoint". eg: "Hello there!" = a vector containing "hello" and "there!"
std::vector<std::string> split(const std::string &text, char splitPoint)
{
	std::string input(text);
	std::string subString;
	
	std::vector<std::string> words;
	int count = 1;
	int a = 0;
	
	for(int x = 0; x < text.size(); x++) {
		subString = "";
		if(text[x] == splitPoint || count == 1) {
			a = (count == 1 ? x : x + 1);
			++count;
			while(1) {
				if(text[a] == splitPoint || a == text.size())
					break;

				subString += text[a++];
			}
			words.push_back(subString);
		}
		subString = "";
	}
	return words;
}

DaWei · May 20th, 2006, 2:32 PM

How about:

(Toggle Plain Text)

  string theHaystack = "www.mysite.com/post.cgi&post=data";
  string theGoodies = theHaystack.substr ((string::size_type) theHaystack.find ("="));

Jessehk · May 20th, 2006, 2:57 PM

Quote:

Originally Posted by DaWei

How about:

(Toggle Plain Text)

  string theHaystack = "www.mysite.com/post.cgi&post=data";
  string theGoodies = theHaystack.substr ((string::size_type) theHaystack.find ("="));

Of course that would work too (and much more simply, efficiently, and cleanly).

I just wanted to show off my split() function.

Brent · May 20th, 2006, 4:11 PM

thanks for the help, it works great

May 20th, 2006, 11:59 AM	#1
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 252 Rep Power: 4	how to parse? i was wondering how i would break this down into three 2 parts: www.mysite.com/post.cgi&post=data i want to be able to take 'data' from the rest of the string and use it. i am using open watcom compiler on windows xp brent

May 20th, 2006, 12:36 PM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	What is a "three 2 part"? In the absence of a clear question, I would say find the "=" and take everything beyond. (Polishes loaner ball bearing while crystal is in the shop.) __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 20th, 2006, 1:55 PM	#3
Jessehk The Oblivious One Join Date: May 2005 Location: Ontario, Canada Posts: 648 Rep Power: 4	I wrote a split function to do this very thing. Enjoy (Toggle Plain Text) //split takes a string of words and returns a vector of words, seperated //by a character specificed in "splitPoint". eg: "Hello there!" = a vector containing "hello" and "there!" std::vector<std::string> split(const std::string &text, char splitPoint) { std::string input(text); std::string subString; std::vector<std::string> words; int count = 1; int a = 0; for(int x = 0; x < text.size(); x++) { subString = ""; if(text[x] == splitPoint \|\| count == 1) { a = (count == 1 ? x : x + 1); ++count; while(1) { if(text[a] == splitPoint \|\| a == text.size()) break; subString += text[a++]; } words.push_back(subString); } subString = ""; } return words; } //split takes a string of words and returns a vector of words, seperated //by a character specificed in "splitPoint". eg: "Hello there!" = a vector containing "hello" and "there!" std::vector<std::string> split(const std::string &text, char splitPoint) { std::string input(text); std::string subString; std::vector<std::string> words; int count = 1; int a = 0; for(int x = 0; x < text.size(); x++) { subString = ""; if(text[x] == splitPoint \|\| count == 1) { a = (count == 1 ? x : x + 1); ++count; while(1) { if(text[a] == splitPoint \|\| a == text.size()) break; subString += text[a++]; } words.push_back(subString); } subString = ""; } return words; } __________________ Dr. Zoidberg: [ecstatic] I'm going to a movie... with FRIENDS!

May 20th, 2006, 2:32 PM	#4
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	How about: (Toggle Plain Text) string theHaystack = "www.mysite.com/post.cgi&post=data"; string theGoodies = theHaystack.substr ((string::size_type) theHaystack.find ("=")); string theHaystack = "www.mysite.com/post.cgi&post=data"; string theGoodies = theHaystack.substr ((string::size_type) theHaystack.find ("=")); __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

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May 20th, 2006, 4:11 PM	#6
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 252 Rep Power: 4	thanks for the help, it works great

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Programming Forums > Application Development > C++

how to parse?