// Printf.cc - shows examples of using printf
#include <iostream>
using namespace std;

int main()
{
  double a = 123456789 ;
  double b = -a/1e6 ;
  double c = -b/1e6 ;
  double d = -c/1e6 ;

  cout << "NICE FORMATTING EXAMPLES\n" ;

  cout << " Integers left aligned, right-aligned and zero-filled in a fixed-width space" << endl ;
  for ( int i = -14 ; i <= 140 ; i += 7 ) {
    printf( "| %-3d | %3d | %04d |\n" , i , i , i ) ;
  }

  cout << endl << "UGLY FORMATTING EXAMPLES\n" ;

  printf( "\n Doubles formatted in the default general way (%%g) \n" ) ; 
  printf( "%g %g %g %g\n" , a,b,c,d ) ; 
  printf( "\n The same Doubles formatted in the default floating point way (%%f) \n" ) ; 
  printf( "%f %f %f %f\n" , a,b,c,d ) ; 
  printf( "\n Doubles formatted in 8 columns with 3 decimal places (%%8.3f); first right aligned then left \n" ) ; 
  printf( "%8.3f %8.3f %8.3f %8.3f\n" , a,b,c,d ) ; 
  printf( "%-8.3f %-8.3f %-8.3f %-8.3f\n" , a,b,c,d ) ;
  cout << " (The '8' is a suggestion, not a demand. If a number doesn't fit \n\
            in 8 columns then more are used)\n\n" ;

  cout << "NICE FORMATTING EXAMPLES\n" ;
  
  printf( "\n Doubles formatted in 8 columns with 2 decimals (%%8.2g); first left aligned, then right \n" ) ; 
  printf( "%-8.2g %-8.2g %-8.2g %-8.2g\n" , a,b,c,d ) ; 
  printf( "%8.2g %8.2g %8.2g %8.2g\n" , a,b,c,d ) ; 

  
  printf( "\n Doubles formatted in 10 columns with 2 decimals (%%10.2g); first left aligned, then right \n" ) ; 
  printf( "%-10.2g %-10.2g %-10.2g %-10.2g\n" , a,b,c,d ) ; 
  printf( "%10.2g %10.2g %10.2g %10.2g\n" , a,b,c,d ) ; 

  char r[]= "|...10...| " ;
  printf( "%s%s%s%s\n" , r,r,r,r ) ; 

  printf( "\n Doubles formatted in 11 columns with 5 decimals (%%11.5g); first left aligned, then right \n" ) ;
  printf( "%-11.5g %-11.5g %-11.5g %-11.5g\n" , a,b,c,d ) ; 
  printf( "%11.5g %11.5g %11.5g %11.5g\n" , a,b,c,d ) ; 
  char ro[]= "|...11....| " ;
  printf( "%s%s%s%s\n" , ro,ro,ro,ro ) ; 

  printf( "\n Doubles formatted in 15 columns with 9 decimals (%%15.9g); first left aligned, then right \n" ) ;
  printf( "%-15.9g %-15.9g %-15.9g %-15.9g\n" , a,b,c,d ) ; 
  printf( "%15.9g %15.9g %15.9g %15.9g\n" , a,b,c,d ) ; 
  char row[]= "|.....15......| " ;
  printf( "%s%s%s%s\n\n" , row,row,row,row ) ; 
}