fig15_21.cpp

来自「Cpp how to program source code」· C++ 代码 · 共 54 行

// Fig. 15.21: Fig15_21.cpp 
// Demonstrating the flags member function.
#include <iostream>
using std::cout;
using std::endl;
using std::ios_base;
using std::oct;
using std::scientific;
using std::showbase;

int main()
{
   int integerValue = 1000;
   double doubleValue = 0.0947628;

   // display flags value, int and double values (original format)
   cout << "The value of the flags variable is: " << cout.flags()
      << "\nPrint int and double in original format:\n"
      << integerValue << '\t' << doubleValue << endl << endl;

   // use cout flags function to save original format
   ios_base::fmtflags originalFormat = cout.flags();
   cout << showbase << oct << scientific; // change format

   // display flags value, int and double values (new format)
   cout << "The value of the flags variable is: " << cout.flags()
      << "\nPrint int and double in a new format:\n"
      << integerValue << '\t' << doubleValue << endl << endl;

   cout.flags( originalFormat ); // restore format

   // display flags value, int and double values (original format)
   cout << "The restored value of the flags variable is: " 
      << cout.flags()
      << "\nPrint values in original format again:\n"
      << integerValue << '\t' << doubleValue << endl;
   return 0;
} // end main

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