C++: Print a string using printf (stdio.h)
In order to print a string in C++ using the printf from the stdio.h library use it as follows:
string Phrase = "Hello!!";
printf("Phrase: %s\n",phrase.c_str());
Μηνιαία αρχεία: Φεβρουάριος 2012
Linux Bash: How to find a string inside C/C++ Source and Header Files
Just issue the following in the folder of the source codes and replace ‘FIND ME’ with the string you want to query:
find -O3 . -regex '.*\.\(c\|cpp\|h\)
You can change the contents of the regular expression to search in different file extensions (file types).
-exec grep 'FIND ME!' -sl '{}' \;
You can change the contents of the regular expression to search in different file extensions (file types).
PHP: Full Redirect of Arguments in PHP
This is how we forward all arguments from one URL to another you need to put this in a .php file on your server (e.g index.php):
<?php
header("Status: 301 Moved Permanently");
header("Location:http://bytefreaks.net/university-of-cyprus".$_SERVER['QUERY_STRING']);
exit;
?>
Example of Usage:
http://www.cs.ucy.ac.cy?/article
Debugging Trick Using Variadic Macros in C and C++
Following you can find a very practical trick that allows you to enable/disable all prints to the screen with as little effort as possible while not dramatically increasing the overall code size to do this.
For C: Place on the top of your code or on a header file the following:
#define ENABLE_DEBUG #ifdef ENABLE_DEBUG #define XDEBUG(...) printf(__VA_ARGS__) #else #define XDEBUG(...) /**/ #endif
and then inside the code whenever you want to print some debug information do as follows:
XDEBUG("Max Weight %d, Total Trips %d\n", minMax, trips);
For C++: Place on the top of your code or on a header file the following:
#define ENABLE_DEBUG #ifdef ENABLE_DEBUG #define XDEBUG cout #else #define XDEBUG if(0) cerr #endif
and then inside the code whenever you want to print some debug information do as follows:
XDEBUG << "We got " << disks << " disks\n";
