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IP-Info

IP-Info is a website where you can find out what your IP is as well as your user agent and information about your browser and OS. The site also has tools for looking up information about a particular IP and reverse DNS lookups. There is also a tool where you can check "is this site down" and numerous informative articles.

Die Seite gibt es auch auf Deutsch: Wie ist meine IP

Valhalla Core Utils Library

Check out the Valhalla Core Utils Library now! Our PHP library has many easy-to-use classes for tasks such as handling Memcached and MySQL connections, making cURL requests, and much more!

Check it out the documentation on the Valhalla Core Utils Website.

View the code in our Git repository here.

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Get help on this challenge

Debugging12


Please read this explanation before attempting debugging challenges.


This C code should be getting 11, but for some reason it prints 5. What's wrong with my code? 

//By BetaT
//Should return 11, what the fuck?
#include <stdio.h>
#include <string.h>

int main(int argc, char **argv)
{
	char *buf = "Hello World";
	int *ptr = (int *)buf;

	buf = ((char*)(ptr + 2)) -2;

	printf("%d", strlen(buf));
	getchar();

	return 0;
}

Downloadable source code can be found here.


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Challenge by BetaT.