C++ STL list with logarithmic lookup ??

If we talk about standard C++ SQL (C++03, at least) looking for a data structure to simulate a list with logarithmic lookup, the question will appear to be contradictory to begin with.

If we are looking for a data structure whose access pattern is different from that of the underlying storage mechanism - Boost MultiIndex is an option worth spending at.

C++ - atexit implementation

More than one occasion - when a program exits - we may want to do some cleanup operations and notify other processes ( this becomes extremely important in the case of child-parent processes).

C/C++ does have a function called atexit() that does that.

A sample code fragment to use the same is as follows.

#include <cstdlib>
#include <iostream>

using namespace std;

void do1()
{
 std::cout << "do1 implementation\n";
}

void do2()
{
 std::cout << "do2 implementation\n";
}


int main()
{
 atexit(do1);
 atexit(do2);

 exit(EXIT_SUCCESS);
}

Sample output:

$ g++ -Wall -Werror testexit.cpp
[noname@localhost test]$ ./a.out
do2 implementation
do1 implementation