Assignment
12
Write a program in C++ to demonstrate the manipulators.
Program
Code with explanation:
1.
#include
<iostream>
2.
#include
<iomanip>
3.
using
namespace std;
4.
int
main( )
5.
{
6.
int
x1=111,x2= 222, x3=333;
7.
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
8.
cout
<< “\t \t Demo of setw with value 10 \n”;
9.
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
10. cout
<< setw(10) << “TestDemo” << setw(20) <<
“Values” << endl;
11. cout
<< setw(10) << “Testing” << setw(20)<< x1
<< endl;
12. cout
<< setw(10) << “Result” << setw(20)<< x2
<< endl;
13. cout
<< setw(10) << “OnOff” << setw(20)<< x3
<< endl;
14. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
15. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
16. cout
<< “\t \t Demo of setfill with value ‘*’ using setw(15) \n”;
17. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
18. cout
<< setw(15) << setfill(‘*’) << 6789 << ” OK”
<< endl;
19. cout
<< setw(15) << setfill(‘*’) << 789 << ” OK”
<< endl;
20. cout
<< setw(15) << setfill(‘*’) << 89 << ” OK”
<< endl;
21. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
22. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
23. cout
<< “\t \t Demo of fixed and scientific value \n”;
24. cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
25. float
x = 0.12345;
26. cout
<< ” fixed ” << setprecision(5) << x << endl;
27. cout
<< ” fixed ” << setprecision(4) << x << endl;
28. cout
<< ” fixed ” << setprecision(3) << x << endl;
29. cout
<< ” scientific ” << x << endl;
30. return
0;
31. }
Explanation
of Code:
Line No. 1, 2 and 3: include the Library file
and stander input – output functions.
Line No. 4: main function header.
Line No. 5 and 31: Begin and end of main
function respectively.
Line
No. 6: Declare
the integer variables.
Line
No. 10 to 13: Demo of setw manipulators.
setw manipulators means set
width.
<iomanip> header file contain
the setw manipulators.
It is used to display specific number of characters filling with
space before it, if numbers of characters are not enough.
Line
No. 18 to 20: Demo of setfill manipulators.
setfill manipulators means set fill
character.
<iomanip> header file contain
the setfill manipulators.
It is used to display specific number of characters filling with
specific character before it, if numbers of characters
are not enough.
Line
No. 26 to 29: Demo of fixed and scientific value manipulators.
setprecision is used to display the specific
number of precision of float number.
Line No. 30: return statement
appropriate with main function return data type.
Program
Code for run:
#include
<iostream>
#include
<iomanip>
using
namespace std;
int
main( )
{
int
x1=111, x2= 222, x3=333;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< “\t \t Demo of setw with value 10 \n”;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< setw(10) << “TestDemo” << setw(20) <<
“Values” << endl;
cout
<< setw(10) << “Testing” << setw(20)<< x1
<< endl;
cout
<< setw(10) << “Result” << setw(20)<< x2
<< endl;
cout
<< setw(10) << “OnOff” << setw(20)<< x3
<< endl;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< “\t \t Demo of setfill with value ‘*’ using setw(15) \n”;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< setw(15) << setfill(‘*’) << 6789 << ” OK”
<< endl;
cout
<< setw(15) << setfill(‘*’) << 789 << ” OK”
<< endl;
cout
<< setw(15) << setfill(‘*’) << 89 << ” OK”
<< endl;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
cout
<< “\t \t Demo of fixed and scientific value \n”;
cout
<< ” * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* \n”;
float
x = 0.12345;
cout
<< ” fixed ” << setprecision(5) << x << endl;
cout
<< ” fixed ” << setprecision(4) << x << endl;
cout
<< ” fixed ” << setprecision(3) << x << endl;
cout
<< ” scientific ” << scientific << x << endl;
return
0;
}
Output
of Program:
* * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * *
Demo
of setw with value 10
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
TestDemo Values
Testing 111
Result 222
OnOff 333
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Demo
of setfill with value ‘*’ using setw(15)
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
***********6789 OK
************789 OK
*************89 OK
* * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * *
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Demo
of fixed and scientific value
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
fixed
0.12345
fixed 0.1235
fixed
0.123
scientific
1.235e-01
