入门计划->使用(C++库)ostringstream输出(格式化)

原创+收藏

//awzzz@2002
//入门计划->使用(C++库)ostringstream输出(格式化)
//APO->using ostringstream.
//accidence project of using ostringstream.(c++ iostream library)

/*
  Reference: http://www.cplusplus.com/ref/iostream/ostringstream/

  Description

  ostringstream class provides an interface to manipulate strings as if
  they were output streams.

  The objects of this class mantain internally a pointer to a stringbuf
  object that can be obtained/modified by calling member rdbuf. This
  streambuf-derived object stores a sequence of characters (string) that
  can be obtained/modified by calling member str.
*/

//使用(C++库)ostringstream输出(格式化)
//simple example

#include <iostream>
#include <sstream>
#include <string>
using namespace std;

void test()
{
    //ostringstream oss;
    //oss.str("abc");
    ostringstream oss("abc");
    
    cout << oss.str() << endl;

    oss << 8 << endl;
    oss << 3.14 << endl;
    oss << " ok ." << endl;

    cout << oss.str() << endl;

    oss << 8 << " "
        << 3.14 << " "
        << " ok ." << endl;

    cout << oss.str() << endl;
}

int main(int argc, char* argv[])
{   
    test();
    return 0;
}