reference

#include <iostream>
#include <log4cpp/Category.hh>
#include <log4cpp/OstreamAppender.hh>
#include <log4cpp/Priority.hh>
#include <log4cpp/PatternLayout.hh>
using namespace std;
int main(int argc, char *argv[]){
        log4cpp::OstreamAppender * osAppender = new log4cpp::OstreamAppender("osAppender",&cout);
        log4cpp::PatternLayout *pLayout = new log4cpp::PatternLayout();
        pLayout->setConversionPattern("%d: %p %c %x: %m%n");
        osAppender->setLayout(pLayout);
        log4cpp::Category &root = log4cpp::Category::getRoot();
        log4cpp::Category &infoCategory = root.getInstance("infoCategory");
        infoCategory.addAppender(osAppender);
        infoCategory.setPriority(log4cpp::Priority::INFO);
        infoCategory.info("system is running");
        infoCategory.warn("system has a warning");
        infoCategory.error("system has a error, can't find a file");
        infoCategory.fatal("system has a fatal error,must be shutdown");
        infoCategory.info("system shutdown,you can find some information in system log");
        log4cpp::Category::shutdown();
        return 0;

}

输出