C++之Boost使用

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1. Get & Build & Install Boost

download boost from http://www.boost.org/

进入boost目录，使用命令：

./bootstrap.sh --prefix=path/to/installation

./b2 install

如此之后：

leave Boost binaries in the lib/ subdirectory of your installation prefix. You will also find a copy of the Boost headers in theinclude/ subdirectory of the installation prefix, so you can henceforth use that directory as an #include path in place of the Boost root directory.

 

2. Use Boost

1) Header-Only Libraries

Most Boost libraries are header-only: they consist entirely of header files containing templates and inline functions, and require no separately-compiled library binaries or special treatment when linking.

比如下面这个例子，使用的就是header-only的library.

 

#include 
#include 
#include 
#include 

int main()
{
    using namespace boost::lambda;
    typedef std::istream_iterator in;

    std::for_each(
        in(std::cin), in(), std::cout << (_1 * 3) << " " );
}

 

编译：

 

c++ -I path/to/boost_1_47_0 example.cpp -o example

then：

 

echo 1 2 3 | ./example

 

 

 

2) Separately-Compiled Binary

 

#include 
#include 
#include 

int main()
{
    std::string line;
    boost::regex pat( "^Subject: (Re: |Aw: )*(.*)" );

    while (std::cin)
    {
        std::getline(std::cin, line);
        boost::smatch matches;
        if (boost::regex_match(line, matches, pat))
            std::cout << matches[2] << std::endl;
    }
}

 

 编译：

 

g++ -I /home/bin.jinb/usr/local/boost/include/ test.cc -o test  \
-L /home/bin.jinb/usr/local/boost/lib/ -lboost_regex   

 

或者：

 

g++ -I /home/bin.jinb/usr/local/boost/include/ test.cc -o test \
 /home/bin.jinb/usr/local/boost/lib/libboost_regex.a