ostrstr.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 30 行

// ostrstr.cpp
// writes formatted data into memory
#include <strstream>
#include <iostream>
#include <iomanip>                  //for setiosflags()
using namespace std;
const int SIZE = 80;                //size of memory buffer

int main()
   {
   char ch = 'x';                   //test data
   int j = 77;
   double d = 67890.12345;
   char str1[] = "Kafka";
   char str2[] = "Freud";

   char membuff[SIZE];              //buffer in memory
   ostrstream omem(membuff, SIZE);  //create stream object

   omem << "ch=" << ch << endl      //insert formatted data
        << "j=" << j << endl        //into object
        << setiosflags(ios::fixed)  //format with decimal point
        << setprecision(2)          //two digits to right of dec
        << "d=" << d << endl
        << "str1=" << str1 << endl
        << "str2=" << str2 << endl
        << ends;                    //end the buffer with '\0'
   cout << membuff;                 //display the memory buffer
   return 0;
   }