в 14:21, 25 мая 2010

2010-05-25T14:21:17Z

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2010-05-25T10:28:53Z

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==A simple output manipulator==

<source lang="cpp">#include <iostream>
#include <iomanip>
using namespace std;
ostream &sethex(ostream &stream)
{
stream.setf(ios::showbase);
stream.setf(ios::hex, ios::basefield);
return stream;
}
int main()
{
cout << 256 << " " << sethex << 256;
return 0;
}</source>
<pre class=codeResult>256 0x100"</pre>

==Create an output manipulator==

<source lang="cpp">#include <iostream>
#include <iomanip>
using namespace std;

ostream &mySetting(ostream &stream)
{
stream.setf(ios::left);
stream << setw(10) << setfill("$");
return stream;
}

int main()
{
cout << 10 << " " << mySetting << 10;

return 0;
}</source>
<pre class=codeResult>10 10$$$$$$$$</pre>

==Create custom ostream operator==

<source lang="cpp">#include <iostream>
#include <iomanip>
using namespace std;
ostream &sethex(ostream &stream){
stream.setf(ios::showbase);
stream.setf(ios::hex);
return stream;
}
int main(void){
cout << 256 << " " << sethex << 256;
}</source>

==Create user-defined, nonparameterized stream manipulators: bell manipulator (using escape sequence \a)==

<source lang="cpp">#include <iostream>
using std::ostream;
using std::cout;
using std::flush;
ostream& bell( ostream& output )
{
return output << "\a"; // issue system beep
}
int main()
{
cout << bell; // use bell manipulator
return 0;
}</source>

==Create user-defined, nonparameterized stream manipulators: carriageReturn manipulator (using escape sequence \r)==

<source lang="cpp">#include <iostream>
using std::ostream;
using std::cout;
using std::flush;

ostream& carriageReturn( ostream& output )
{
return output << "\r"; // issue carriage return
}
int main()
{
cout << carriageReturn << "-----" ;
return 0;
}</source>

==EndLine manipulator (using escape sequence \n and member function flush)==

<source lang="cpp">#include <iostream>
using std::ostream;
using std::cout;
using std::flush;
ostream& endLine( ostream& output )
{
return output << "\n" << flush; // issue endl-like end of line
}
int main()
{
cout << "-----" << endLine;
return 0;
}</source>
<pre class=codeResult>-----</pre>

==ostream flag==

<source lang="cpp">#include <iostream>
#include <iomanip>
using namespace std;
ostream &ra(ostream &stream)
{
stream << "-------------- ";
return stream;
}
// Left Arrow
ostream &la(ostream &stream)
{
stream << "*************";
return stream;
}
int main()
{
cout << ra << 1233.23 << "\n";
cout << ra << 567.66 << la;
return 0;
}</source>
<pre class=codeResult>-------------- 1233.23
-------------- 567.66*************"</pre>

==tab manipulator (using escape sequence \t)==

<source lang="cpp">#include <iostream>
using std::ostream;
using std::cout;
using std::flush;
ostream& tab( ostream& output )
{
return output << "\t"; // issue tab
}
int main()
{
cout << tab << "b" << tab << "c" ;
return 0;
}</source>
<pre class=codeResult>b c</pre>

==Using the endl stream manipulator.==

<source lang="cpp">#include <iostream>
using namespace std;
int main()
{
cout << "Welcome to ";
cout << "C++!";
cout << endl; // end line stream manipulator
return 0;
}</source>

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в 14:21, 25 мая 2010

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