C++高效编程：内存与性能优化

 

#include <iostream>

#include <fstream>

namespace std;    

   4:  

int main(){

   6: ofstream out;

,ios::app);

   8: streambuf *backup = clog.rdbuf();

   9: clog.rdbuf(out.rdbuf());

<<endl;

  11: out.close();

//必须重定向回来

  13:  

  14: }