/* Formatting  and    <iomanip.h>
                                   file: 4ex2.cpp  (or used as 4ex2.appended)
   FALL 1998
   ___________________________________
   Jacob Y. Kazakia   jyk0
   September 28, 1998
   Programming example  2 of week 4
   Recitation Instructor: J.Y.Kazakia
   Recitation Section  01
   ___________________________________

   Purpose: This program reads three numbers a, b, and c through the keyboard
            and  outputs them on the screen in various  SCIENTIFIC  formats.

   Algorithm: The main idea here is explained on page 114 of the book
              where the functions: setiosflags, setw, setprecision are
              explained.

              ios:: fixed
              ios:: scientific
              ios:: showpoint

                                                                          */
#include <iostream.h>
#include <iomanip.h>

void main()
{
//  variables are typed and defined

float a,b,c;     // the three numbers

cout<<" \n\n   Please enter 3 numbers \n  a = ";
cin>>a;
cout<<"\n  b = ";
cin>>b;
cout<<"\n  c = ";
cin>>c;

// Output everything in scientific form

cout<<setiosflags( ios::scientific );

//***********************************************************

cout<<"\n\n\n    With precision 5 and width 20  \n";
cout<<setprecision(5);

cout<<"\n         1         2         3         4         5 \n";
cout<<"12345678901234567890123456789012345678901234567890 \n" ;
cout<< setw(20)<<a <<setw(20)<< b <<setw(20)<< c ;

//***********************************************************

cout<<"\n\n\n    With precision 3  and width 10  \n" ;
cout<<setprecision(3);

cout<<"\n         1         2         3         4         5 \n";
cout<<"12345678901234567890123456789012345678901234567890 \n" ;
cout<< setw(10)<<a <<setw(10)<< b <<setw(10)<< c ;

//***********************************************************

cout<<endl<<endl;
cout<<" enter e (exit) to terminate the program....";
char w;
cin>>w;
}


 /*     THESE ARE SOME OF THE OUTPUTS



   Please enter 3 numbers
  a = 0.0000000000001

  b = 123456789.45678

  c = -4567.0000000045



    With precision 5 and width 20

         1         2         3         4         5
12345678901234567890123456789012345678901234567890
         1.00000e-13         1.23457e+08        -4.56700e+03


    With precision 3  and width 10

         1         2         3         4         5
12345678901234567890123456789012345678901234567890
 1.000e-13 1.235e+08-4.567e+03

 enter e (exit) to terminate the program....


 ************************************************************
 **************************************************************




   Please enter 3 numbers
  a = 123

  b = 12

  c = 0.6789



    With precision 5 and width 20

         1         2         3         4         5
12345678901234567890123456789012345678901234567890
         1.23000e+02         1.20000e+01         6.78900e-01


    With precision 3  and width 10

         1         2         3         4         5
12345678901234567890123456789012345678901234567890
 1.230e+02 1.200e+01 6.789e-01

 enter e (exit) to terminate the program....e                  */