fig19_12.cpp

来自「这是C＋＋编程经典的书上实例的源代码。 （英文名是《C＋＋ how to pr」· C++ 代码 · 共 63 行

// Fig. 19.12: fig19_12.cpp
// Demonstrating input from an istringstream object.
#include <iostream>

using std::cout;
using std::endl;

#include <string>

using std::string;

#include <sstream>

using std::istringstream;

int main()
{
   string input( "Input test 123 4.7 A" );
   istringstream inputString( input );
   string string1, string2;
   int i;
   double d;
   char c;

   inputString >> string1 >> string2 >> i >> d >> c;

   cout << "The following items were extracted\n"
        << "from the istringstream object:"
        << "\nstring: " << string1 
        << "\nstring: " << string2 
        << "\n   int: " << i 
        << "\ndouble: " << d 
        << "\n  char: " << c;

   // attempt to read from empty stream
   long x;

   inputString >> x;

   if ( inputString.good() )
      cout << "\n\nlong value is: " << x << endl;
   else
      cout << "\n\ninputString is empty" << endl;

   return 0;
}


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