[user02@FC4 Lesson04]$ cat -n setw.cpp

   1  #include <iostream>
   2  #include <iomanip>
   3  using namespace std;
   4
   5  int main()
   6  {
   7    cout << "My favorite number is" << setw(3) << 1001 << endl;
   8    cout << "My favorite number is" << setw(4) << 1001 << endl;
   9    cout << "My favorite number is" << setw(5) << 1001 << endl;
  10    cout << "My favorite number is" << setw(6) << 1001 << endl;
  11
  12    return 0;
  13  }

[user02@FC4 Lesson04]$ g++ -o setw setw.cpp
[user02@FC4 Lesson04]$ ./setw
My favorite number is1001
My favorite number is1001
My favorite number is 1001
My favorite number is 1001
[user02@FC4 Lesson04]$