C++ Tutorial/Data Types/int display

Change width as you output

<source lang="cpp">#include <iostream>

1. include <iomanip>

using namespace std; int main(void){

  cout << setw(5) << 1 << "\n" << setw(6) << 2; 
  cout << "\n" << setw(7) << 3;

}</source>

Displaying Leading Zeros

<source lang="cpp">#include <iomanip>

1. include <iostream>

using namespace std; int main( ) {

  const int num_members = 6;
  const int id[num_members] = { 6, 5, 1, 8,3, 2 };
  const int month[num_members] = { 9, 1, 1, 12, 10, 4 };
  const int day[num_members] = { 2, 1, 13, 30, 31, 4 };
  const int year[num_members] = { 2000, 2003, 2004, 1998,2001, 2003 };
  cout << setfill( "0" );
  for( int i = 0; i < num_members; ++i )
     cout << ": " << setw( 8 ) << id[i]
        << " : " << setw( 2 ) << month[i] << "/"
        << setw( 2 ) << day[i] << "/" << setw( 2 )
        << year[i] % 100 << endl;

}</source>

Line up columns of data with cout.width

<source lang="cpp">#include <iostream> using namespace std; int main() {

 cout << "Root | Square | Cube\n";
 for(int i = 1; i < 11; ++i) {
   cout.width(4);
   cout << i << " |";
   cout.width(7);
   cout << i * i << " |";
   cout.width(8);
   cout << i * i * i;
   cout << endl;
 }
 return 0;

}</source>

Output decimal to hexadecimal, octal and align the output

<source lang="cpp">#include <iostream>

1. include <iomanip>

using namespace std; int main() {

  const int number = 185;
  cout << "The number is " << number << endl;
  cout << "The number is " << hex <<  number << endl;
  cout.setf(ios::showbase);
  cout << "The number is " << hex <<  number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout << hex << number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout.setf(ios::left);
  cout << hex << number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout.setf(ios::internal);
  cout << hex << number << endl;
  cout << "The number is:" << setw(10) << hex << number << endl;
  return 0;

}</source>

Set cout for hex number output

<source lang="cpp">#include <iostream>

1. include <iomanip>

using namespace std; int main() {

  const int number = 185;
  cout << "The number is " << number << endl;
  cout << "The number is " << hex <<  number << endl;
  cout.setf(ios::showbase);
  cout << "The number is " << hex <<  number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout << hex << number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout.setf(ios::left);
  cout << hex << number << endl;
  cout << "The number is " ;
  cout.width(10);
  cout.setf(ios::internal);
  cout << hex << number << endl;
  cout << "The number is:" << setw(10) << hex << number << endl;
  return 0;

}</source>

setiosflags(ios::left) and resetiosflags(ios::left)

<source lang="cpp">#include <iostream>

1. include <iomanip>

using namespace std; int main(void){

  cout.width(5);
  cout << setiosflags(ios::left) << 5 << "\n"; 
  cout.width(5);
  cout << 5 << "\n" << resetiosflags(ios::left); 
  cout.width(5);
  cout << 1;

}</source>

Using various padding characters

<source lang="cpp">#include <iostream>

1. include <iomanip>

using std::cout; using std::endl; using std::ios; using std::setw; using std::hex; using std::dec; using std::setfill; int main() {

  int x = 10000;
  cout.setf( ios::right, ios::adjustfield );
  cout.fill( "*" );
  cout << setw( 10 ) << dec << x << "\n";
  cout.setf( ios::left, ios::adjustfield );
  cout << setw( 10 ) << setfill( "%" ) << x << "\n";
  cout.setf( ios::internal, ios::adjustfield );
  cout << setw( 10 ) << setfill( "^" ) << hex << x << endl;
  return 0;

}</source>