C++/Console/cout flag status

cout flags: showpoint, showpos

<source lang="cpp">

1. include <iostream>

using namespace std; int main( ) {

 cout.setf(ios::showpoint | ios::showpos, ios::showpoint);
 cout << 102340.0; 
 return 0;

}

      </source>

Displays the status of the format flags.

<source lang="cpp">

1. include <iostream>

using namespace std; void showflags(); int main() {

 // show default condition of format flags
 showflags();
 cout.setf(ios::oct | ios::showbase | ios::fixed);
 showflags();
 return 0; 

} void showflags() {

 ios::fmtflags f;
 f = cout.flags();  // get flag settings
 
 if(f & ios::skipws) cout << "skipws on\n";
 else cout << "skipws off\n";
 if(f & ios::left) cout << "left on\n";
 else cout << "left off\n";
 if(f & ios::right) cout << "right on\n";
 else cout << "right off\n";
 if(f & ios::internal) cout << "internal on\n";
 else cout << "internal off\n";
 if(f & ios::dec) cout << "dec on\n";
 else cout << "dec off\n";
 if(f & ios::oct) cout << "oct on\n";
 else cout << "oct off\n";
 if(f & ios::hex) cout << "hex on\n";
 else cout << "hex off\n";
 if(f & ios::showbase) cout << "showbase on\n";
 else cout << "showbase off\n";
 if(f & ios::showpoint) cout << "showpiont on\n";
 else cout << "showpoint off\n";
 if(f & ios::showpos) cout << "showpos on\n";
 else cout << "showpos off\n";
 if(f & ios::uppercase) cout << "uppercase on\n";
 else cout << "uppercase off\n";
 if(f & ios::scientific) cout << "scientific on\n";
 else cout << "scientific off\n";
 if(f & ios::fixed) cout << "fixed on\n";
 else cout << "fixed off\n";
 if(f & ios::unitbuf) cout << "unitbuf on\n";
 else cout << "unitbuf off\n";
 if(f & ios::boolalpha) cout << "boolalpha on\n";
 else cout << "boolalpha off\n";
 cout << endl;

}

      </source>

Store cout flags, set to new ones and restore

<source lang="cpp">

1. include <iostream>

using namespace std; int main() {

 ios::fmtflags f;
 f = cout.flags(); // store flags
 cout.unsetf(ios::dec);
 cout.setf(ios::showbase | ios::hex);
 cout << 100 << "\n";
 cout.flags(f); // reset flags
 return 0;

}

      </source>

Using Manipulators to Format I/O

<source lang="cpp">

/* Manipulator Purpose Input/Output

---

+----------------------------------------+---------------

boolalpha Turns on boolapha flag. Input/Output dec Turns on dec flag. Input/Output endl Output a newline character and Output

                 flush the stream.

ends Output a null. Output fixed Turns on fixed flag. Output flush Flush a stream. Output hex Turns on hex flag. Input/Output internal Turns on internal flag. Output left Turns on left flag. Output nobooalpha Turns off boolalpha flag. Input/Output noshowbase Turns off showbase flag. Output noshowpoint Turns off showpoint flag. Output noshowpos Turns off showpos flag. Output noskipws Turns off skipws flag. Input nounitbuf Turns off unitbuf flag. Output nouppercase Turns off uppercase flag. Output oct Turns on oct flag. Input/Output resetiosflags Turn off the flags specified in f. Input/Output (fmtflags f) right Turns on right flag. Output scientific Turns on scientific flag. Output setbase(int base) Set the number base to base. Input/Output setfill(int ch) Set the fill character to ch. Output setiosflags Turn on the flags specified in f. Input/output (fmtflags f) setprecision Set the number of digits of precision. Output (int p) setw(int w) Set the field width to w. Output showbase Turns on showbase flag. Output showpoint Turns on showpoint flag. Output showpos Turns on showpos flag. Output skipws Turns on skipws flag. Input unitbuf Turns on unitbuf flag. Output uppercase Turns on uppercase flag. Output ws Skip leading white space. Input

• /

      </source>