1. Formatting Output iomanip.h Objects Escape Sequences setw()
setiosflags(…)
setprecision()

2. Output ¾ cout The object cout is used to direct data to the ststandard output device, usually the monitor.
w predefined stream object w in iostream library w used with insertion operator << *

3. Output ¾ cout Syntax: cout << ExprOrString;
Read << as “put to”. cout << 24; cout << ‘y’; cout << “Hello”; *

4. Output ¾ cout Syntax: cout << ExprOrString;
cout << “The answer to question “; cout << qu_num; cout << “ is “; cout << 1.5 * pay_rate; *

5. Output ¾ cout Syntax: cout << ExprOrString << ExprOrString; Each appends data to the stream.
cout << “Num1 * num2 is “ << num1*num2;
OUTPUT Num1 * num2 is 110
space
* *

6. Output ¾ cout Syntax: cout << ExprOrString << ExprOrString; Each appends data to the stream.
cout << “Num =“ << 35.1;
OUTPUT Num =35.1
no space
* *

7. Output ¾ cout Syntax: cout << ExprOrString << ExprOrString; Each appends data to the stream.
cout << “Hi, “ << name << “how are you?”;
no space
space
OUTPUT Hi, Shadowhow are you?
* * *

8. Output ¾ cout Syntax: cout << ExprOrString << ExprOrString;
cout << “The answer to question “; cout << qu_num; cout << “ is “; cout << 1.5 * pay_rate;
no ;
cout << “The answer to question “ << qu_num << “ is “<< 1.5 * pay_rate;
* *

9. Output ¾ cout Syntax: cout << ExprOrString << ExprOrString
Output ¾ cout Syntax: cout << ExprOrString << ExprOrString << ExprOrString ;
cout << “The answer to question number 17 is listed after question “; cout << lastqu << ‘.’;
cout << “The answer to question number 17 “
<< “is listed after question “ << lastqu
<< ‘.’;
no ;
* *

10. Escape Sequences
\ Changes the meaning of the character that follows it. \n hard return \t tab \\ \ \” “ \a beep or bell
These must be within quotation marks.

11. Escape Sequences
cout << “Name\tTotal\tGrade\n”; cout << “Miyo\t186\t B\n”; cout << “\n Jake\t211\t A\n”; cout << “Syd\t203\t A\n”;
OUTPUT Name Total Grade Miyo B Jake A Syd A _
\n \n gives a blank line *

12. Escape Sequences
\ Changes the meaning of the character that follows it. \” take quotes literally
“Alfonsus \”Butch\” Billone” gives Alfonsus ”Butch” Billone *

13. Escape Sequences “\n Alfonsus\n\”Butch\” \nBillone” gives
Alfonsus “Butch” Billone
“|\n Alfonsus\n \t \”Butch\” \tBillone|” gives |
Alfonsus “Butch” Billone|
* * * *

14. Formatting Output endl
does the same thing as \n - inserts a hard return
requires the insertion operator
cout << endl << endl; is the same as: cout << “\n\n”;

15. Formatting Output
iomanip.h contains the objects which have special effects on the iostream.
#include <iostream.h> #include <iomanip.h> *

16. Formatting Output iomanip
Formatting Output iomanip.h contains the objects which have special effects on the iostream.…… …...
setw(n) how many columns for data setprecision(n) sets number of decimals
setiosflags(ios::fixed) displays 6 digits after the decimal
* * *

17. Formatting Output setw(n) how many columns for data
cout << setw(4) << ans cout << setw(1) << ans << setw(5) << num << setw(3) << num << setw(4) << “Hi”; << setw(3) << “Hi”;
fields expand
¨o33¨7132¨oHi ¨Hi
* *

18. Formatting Output setprecision(n) sets number of decimals
x = format result setw(10) setprecision(2) ¨ooo314.00
point counts
setw(10) setprecision(5) ¨
columns added
setw(7) setprecision(5)
* * *

19. Formatting Output setiosflags(ios::fixed) displays 6 digits after
Formatting Output setiosflags(ios::fixed) displays 6 digits after the decimal
#include<iostream.h>
#include<iomanip.h>
void main() {
double v = ;
double w = ;
double x = ;
double y = ;
double z = ;

20. Formatting Output
cout <<v<< endl<<w<< endl <<x<< endl
<<y<< endl <<z<<”\n\n”;
cout << setiosflags(ios::fixed);
cout <<v<< endl <<w<< endl <<x<< endl
cout << setprecision(2); }

21. Formatting Output default 0.00123457 1.23457 12.3457 1234.57 12345.7
ios::fixed
+ setprecision(2)
0.00
1.23
12.35

22. Formatting Output For decimal alignment use:
ios::fixed and setprecision( ) sitcky
setw( ) only once
cout << setiosflags(ios::fixed) << setprecision(n);
l l l
cout << “- -” << setw(n) << var1 << setw(n) << “- -”;
cout << “- -\t” << setw(n) << var1 << setw(n) <<var2; *

23. cout Syntax
cout << ExprOrStringOrManipulator << ExprOrStringOrManipulator...;

24. Good luck is nothing but prepardness and opportunity coming together.