computer science 1620 formatting. suppose you work for the hr dept. of a company you wish to write a...

Computer Science 1620

Formatting

Suppose you work for the HR dept. of a company you wish to write a program to show their earnings per

month Details:

20% of Salary is deducted for tax 5% is deducted for CPP 2% is deducted for EI 8% is deducted for Pension 35.00 is deducted for Health Care Employer pays 85.00 towards Health Care

Write a program that takes in a salary for the month, calculates the deductions, and produces a paystub for the employee

these are matchedby the employer

Earnings Deductions

Description Amount Description Employee Employer

Salary 3000 Tax 600

CPP 150 150

EI 60 60

Pension 240 240

Health Plan 35 85

Total 3000 Total 1085 535

Net Pay 1915


#include <iostream> using namespace std;

int main() {

return 0;}



int main() {

float salary; cout << "Salary: "; cin >> salary;

return 0;}



int main() {


float tax = salary * 0.2; float cpp = salary * 0.05; float ei = salary * 0.02; float pension = salary * 0.08; float employee_d = tax + cpp + ei + pension + 35.00; float employer_d = tax + cpp + ei + pension + 85.00;

return 0;}

20% of Salary is deducted for tax5% is deducted for CPP2% is deducted for EI8% is deducted for Pension35.00 is deducted for Health CareEmployer pays 85.00 towards Health Care



int main() {


float tax = salary * 0.2; float cpp = salary * 0.05; float ei = salary * 0.02; float pension = salary * 0.08; // calculate total deductions for employee and employer

float your_d = tax + cpp + ei + pension + 35.00; float their_d = cpp + ei + pension + 85.00;

// continued on next slide

20% of Salary is deducted for tax5% is deducted for CPP2% is deducted for EI8% is deducted for Pension35.00 is deducted for Health CareEmployer pays 85.00 towards Health Care


// continued

return 0;}


// continued

return 0;}

Earnings Deductions


Salary 3000 Tax 600

CPP 150 150

EI 60 60

Pension 240 240

Health Plan 35 85


Net Pay 1915


// continued

cout << "Earnings Deductions" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << "CPP " << cpp << " " << cpp << endl; cout << "EI " << ei << " " << ei << endl; cout << "Pension " << pension << " " << pension << endl; cout << "Health Plan " << 35.00 << " " << 85.00 << endl; cout << "Total " << your_d << " Total " << their_d << endl; cout << "Net Pay " << salary – your_d << endl;

return 0;}

Earnings Deductions


Salary 3000 Tax 600

CPP 150 150

EI 60 60

Pension 240 240

Health Plan 35 85


Net Pay 1915

We wanted this:

Salary: 3000Earnings DeductionsDescription Amount Description Employee EmployerSalary 3000 Tax 600CPP 150 150EI 60 60Pension 240 240Health Plan 35 85Total 1085 Total 535Net Pay 1915

We got this:

Content (information) is the same Presentation (format) is different

add some lines add correct spacing between values

Earnings Deductions


Salary 3000 Tax 600

CPP 150 150

EI 60 60

Pension 240 240

Health Plan 35 85


Net Pay 1915


// continued

cout << "Earnings Deductions" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << "CPP " << cpp << " " << cpp << endl; cout << "EI " << ei << " " << ei << endl; cout << "Pension " << pension << " " << pension << endl; cout << "Health Plan " << 35.00 << " " << 85.00 << endl; cout << "Total " << your_d << " Total " << their_d << endl; cout << "Net Pay " << salary – your_d << endl;

return 0;

}

Add some lines!


// continued

cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << "CPP " << cpp << " " << cpp << endl; cout << "EI " << ei << " " << ei << endl; cout << "Pension " << pension << " " << pension << endl; cout << "Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << your_d << " Total " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << "Net Pay " << salary – your_d << endl;

return 0;

}

Add some lines!


// continued

cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << "CPP " << cpp << " " << cpp << endl; cout << "EI " << ei << " " << ei << endl; cout << "Pension " << pension << " " << pension << endl; cout << "Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << your_d << " Total " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << "Net Pay " << salary – your_d << endl;

return 0;

} Add some spaces!


// continued

cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << " CPP " << cpp << " " << cpp << endl; cout << " EI " << ei << " " << ei << endl; cout << " Pension " << pension << " " << pension << endl; cout << " Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << salary << " Total " << your_d << " " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << " Net Pay " << salary – your_d << endl;

return 0;

}Add some spaces!

Suppose employee gets a raise to $3307

Suppose employee gets a raise to $3307.37

Formatting Issues# of decimal places arbitrarysome decimals are displayed, others are notnumbers are not aligned

Formatting Output recall that cout has the following syntax:

cout can actually take a formatting manipulator as well:

these manipulators control what the output will look like

cout << expression

cout << expression or manipulator

Fixed and Scientific by default, C++ has a limit on the number of digits it

uses when displaying a floating-point number significant digits on my computer, this default is 6 (common)

what happens when the number has more than 6 digits?

#include <iostream> using namespace std; int main() { cout << 123456.7 << endl; cout << 1234567.8 << endl;

return 0;}

Only 6 digits are shown Number is rounded off

Fixed and Scientific we can instruct C++ to display all of its digits (as

many as it can store) by setting either the fixed flag or the scientific flag

if fixed is used, display numbers in fixed format if scientific is used, display numbers in scientific notation

Syntax:

cout << fixed; // fixed format

cout << scientific; // sci. format

Example:

#include <iostream>#include <iomanip> using namespace std; int main() { cout << 123456.7 << endl;

cout << fixed;

cout << 123456.7 << endl;

cout << scientific; cout << 123456.7 << endl; return 0;}

Fixed and Scientific the statement

cout << fixed

has the effect of turning on fixed mode all floating-point numbers from that point forward

will be displayed in fixed mode until: 1) fixed mode is turned off 2) scientific mode is turned on

the same applies to scientific mode

Example:

#include <iostream>#include <iomanip> using namespace std; int main() { cout << fixed;

cout << 123456.7 << endl; cout << 100.0 << endl;

cout << scientific; cout << 123456.7 << endl; cout << 100.0 << endl;

return 0;}

Fixed and Scientific by default, both fixed and scientific are off

we will refer to this as default mode

to turn off fixed (2 ways) cout << resetiosflags(ios::fixed); cout.unsetf(ios::fixed); // textbook way

to turn off scientific: cout << resetiosflags(ios::scientific); cout.unsetf(ios::scientific); // textbook way

Example:

#include <iostream>#include <iomanip> using namespace std; int main() { cout << fixed;


cout << resetiosflags(ios::fixed);


return 0;}

setprecision by default, C++ has a limit on the number of digits it

uses when displaying a floating-point number significant digits on my computer, this default is 6 (common)

can this number be set higher, without resorting to fixed or scientific mode?

use the setprecision flag

Syntax:cout << setprecision( ); # of digits

Example:

#include <iostream>#include <iomanip> using namespace std; int main() {

cout << 123456.7 << endl;

cout << setprecision(7);

cout << 123456.7 << endl; return 0;

}

setprecision in default mode, setprecision sets the

number of digits for displaying what does it do in fixed and scientific mode?

sets the number of decimal places

Example:#include <iostream>#include <iomanip> using namespace std; int main() {

cout << setprecision(3);

cout << 123.45 << endl;

cout << fixed;

cout << 123.45 << endl;

cout << scientific;

cout << 123.45 << endl; return 0;

}

setprecisionnote that setprecision does not change

the value being stored in memory it simply affects the displayed value


double x = 141.5;

cout << setprecision(4); cout << x << endl;

cout << setprecision(3); cout << x << endl;

cout << setprecision(4); cout << x << endl; return 0;

}

showpointby default, the number 123.0 is shown as

123 in default mode for some compilers, this is also the case in fixed

modeuse the showpoint flag to force floating point

numbers to show their decimal place


cout << 123.0 << endl;

cout << showpoint; cout << 123.0 << endl; return 0;

}

Back to our example:suppose I want all of my numbers to be

displayed with exactly two decimal placesuse the following formatting flags:

fixed showpoint setprecision(2)


// continued

cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << " CPP " << cpp << " " << cpp << endl; cout << " EI " << ei << " " << ei << endl; cout << " Pension " << pension << " " << pension << endl; cout << " Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << salary << " Total " << your_d << " " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << " Net Pay " << salary – your_d << endl;

return 0;

}Add formatting flags!


// continued

cout << fixed << showpoint << setprecision(2); cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << " CPP " << cpp << " " << cpp << endl; cout << " EI " << ei << " " << ei << endl; cout << " Pension " << pension << " " << pension << endl; cout << " Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << salary << " Total " << your_d << " " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << " Net Pay " << salary – your_d << endl;

return 0;

}Add formatting flags!


// continued

cout << fixed << showpoint << setprecision(2); cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << " CPP " << cpp << " " << cpp << endl; cout << " EI " << ei << " " << ei << endl; cout << " Pension " << pension << " " << pension << endl; cout << " Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << salary << " Total " << your_d << " " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << " Net Pay " << salary – your_d << endl;

return 0;

}Adjust spacing


// continued

cout << fixed << showpoint << setprecision(2); cout << "------------------------------------------------------------" << endl; cout << "Earnings Deductions" << endl; cout << "------------------------------------------------------------" << endl; cout << "Description Amount Description Employee Employer" << endl; cout << "------------------------------------------------------------" << endl; cout << "Salary " << salary << " Tax " << tax << endl; cout << " CPP " << cpp << " " << cpp << endl; cout << " EI " << ei << " " << ei << endl; cout << " Pension " << pension << " " << pension << endl; cout << " Health Plan " << 35.00 << " " << 85.00 << endl; cout << "------------------------------------------------------------" << endl; cout << "Total " << salary << " Total " << your_d << " " << their_d << endl; cout << "------------------------------------------------------------" << endl; cout << " Net Pay " << salary - your_d << endl;

return 0;

}Adjust spacing

Nice Output:

but what happens if the salary is much bigger (or smaller)

Earnings Deductions


Salary 3000 Tax 600

CPP 150 150

EI 60 60

Pension 240 240

Health Plan 35 85


Net Pay 1915

Our spacing worked when:salary was a four digit numberEI was a three digit number

It would be nice if:everything in each column was printed at

the same width, regardless of how many characters the actual value has

setwstands for set widthsets the number of characters that will be

used to display the next expressionsyntax:

cout << setw( ); # of chars


cout << "|" << "Kev" << "|" << endl; cout << "|" << setw(5) << "Kev" << "|" << endl; return 0;

}

Kev|


| |

This tells C++ to use 5 characters to output the nextexpression.

Kev|


| |

This expression requires only three characters for output.

Kev|


| |

This expression requires only three characters for output.• when the field width is bigger than the expression, C++ "pads" the expression with spaces• the padding is placed on the left hand side

• expression is padded with two spaces before output• the expression now has 5 characters

Kev|


| |

setwwhat happens if the output requires more

characters than setw gives it?

cout << setw(5) << "Computer Science" << endl;

• the field width is always set at least as big as the output

Noteunlike setprecision, fixed, scientific, and

showpoint, setw only applies to the next expression (not all expressions hereafter)

cout << setw(5) << "Kev" << "Kev" << endl;

displayed with 5 characters (2 pad spaces)

displayed with 3 characters (no padding)

Back to our previous example: we can break up the table into 6 columns each column has a specific width

-------------------------------------------------------------Earnings Deductions-------------------------------------------------------------Description Amount Description Employee Employer-------------------------------------------------------------Salary 3000.00 Tax 600.00 CPP 150.00 150.00 EI 60.00 60.00 Pension 240.00 240.00 Health Plan 35.00 85.00-------------------------------------------------------------Total 3000.00 Total 1085.00 535.00------------------------------------------------------------- Net Pay 1915.00

814 5 14 10 10

When outputting our data, we will include a setw for each expression, depending on which column it is in for the first column:

cout << setw(14) << "Salary" for the second column:

cout << setw(8) << salary; etc

What do we do with a blank field entry? cout << setw(5) << ""; // output 5 blank spaces

Write a program that takes in a salary for the month, calculates the deductions, and produces a paystub for the employee cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Earnings" << setw(8) << "" << setw(5) << "" << setw(14) << "Deductions" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Description" << setw(8) << "Amount" << setw(5) << "" << setw(14) << "Description" << setw(10) << "Employee" << setw(10) << "Employer" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Salary" << setw(8) << salary << setw(5) << "" << setw(14) << "Tax" << setw(10) << tax << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "CPP" << setw(10) << cpp << setw(10) << cpp << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "EI" << setw(10) << ei << setw(10) << ei << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "Pension" << setw(10) << pension << setw(10) << pension << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "Health Plan" << setw(10) << 35.00 << setw(10) << 85.00 << endl;

cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Total" << setw(8) << salary << setw(5) << "" << setw(14) << "Total" << setw(10) << your_d << setw(10) << their_d << endl; cout << "-------------------------------------------------------------" << endl;

cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "" << setw(10) << "Net Pay" << setw(10) << salary - your_d << endl; return 0;

}

Note:we can concatenate consecutive blanks into

one long blank instead of:

cout << setw(14) << "" << setw(8) << "";

we could write: cout << setw(22) << "";

Write a program that takes in a salary for the month, calculates the deductions, and produces a paystub for the employee cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Earnings" << setw(8) << "" << setw(5) << "" << setw(14) << "Deductions" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Description" << setw(8) << "Amount" << setw(5) << "" << setw(14) << "Description" << setw(10) << "Employee" << setw(10) << "Employer" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Salary" << setw(8) << salary << setw(5) << "" << setw(14) << "Tax" << setw(10) << tax << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "CPP" << setw(10) << cpp << setw(10) << cpp << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "EI" << setw(10) << ei << setw(10) << ei << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "Pension" << setw(10) << pension << setw(10) << pension << endl; cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "Health Plan" << setw(10) << 35.00 << setw(10) << 85.00 << endl;


cout << setw(14) << "" << setw(8) << "" << setw(5) << "" << setw(14) << "" << setw(10) << "Net Pay" << setw(10) << salary - your_d << endl; return 0;

}


cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Earnings" << setw(13) << "" << setw(14) << "Deductions" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Description" << setw(8) << "Amount" << setw(5) << "" << setw(14) << "Description" << setw(10) << "Employee" << setw(10) << "Employer" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Salary" << setw(8) << salary << setw(5) << "" << setw(14) << "Tax" << setw(10) << tax << endl; cout << setw(27) << "" << setw(14) << "CPP" << setw(10) << cpp << setw(10) << cpp << endl; cout << setw(27) << "" << setw(14) << "EI" << setw(10) << ei << setw(10) << ei << endl;

cout << setw(27) << "" << setw(14) << "Pension" << setw(10) << pension << setw(10) << pension << endl; cout << setw(27) << "" << setw(14) << "Health Plan" << setw(10) << 35.00 << setw(10) << 85.00 << endl;


cout << setw(41) << "" << setw(10) << "Net Pay" << setw(10) << salary - your_d << endl; return 0;

}

We still have a problem:setw automatically pads on the leftnow, our descriptions are right aligned

left and rightwhen left is used, padding spaces are put

on the right (the field is left-aligned)when right is used, padding spaces are put

on the left (the field is right aligned)note that left and right are not one-time use

when left is used, everything is left-aligned until otherwise specified (same for right)

Back to our previous example: column 1 and 4 are left aligned column 2, 5, and 6 are right aligned

-------------------------------------------------------------Earnings Deductions-------------------------------------------------------------Description Amount Description Employee Employer-------------------------------------------------------------Salary 3000.00 Tax 600.00 CPP 150.00 150.00 EI 60.00 60.00 Pension 240.00 240.00 Health Plan 35.00 85.00-------------------------------------------------------------Total 3000.00 Total 1085.00 535.00------------------------------------------------------------- Net Pay 1915.00


cout << "-------------------------------------------------------------" << endl; cout << left << setw(14) << "Earnings" << setw(13) << "" << setw(14) << "Deductions" << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(14) << "Description" << right << setw(8) << "Amount" << setw(5) << "" << left << setw(14) << "Description" << right << setw(10) << "Employee" << setw(10) << "Employer" << endl; cout << "-------------------------------------------------------------" << endl;

cout << left << setw(14) << "Salary" << right << setw(8) << salary << setw(5) << "" << left << setw(14) << "Tax" << right << setw(10) << tax << endl; cout << left << setw(27) << "" << setw(14) << "CPP" << right << setw(10) << cpp << setw(10) << cpp << endl; cout << left << setw(27) << "" << setw(14) << "EI" << right << setw(10) << ei << setw(10) << ei << endl; cout << left << setw(27) << "" << setw(14) << "Pension" << right << setw(10) << pension << setw(10) << pension << endl; cout << left << setw(27) << "" << setw(14) << "Health Plan" << right << setw(10) << 35.00 << setw(10) << 85.00 << endl; cout << "-------------------------------------------------------------" << endl; cout << left << setw(14) << "Total" << right << setw(8) << salary << setw(5) << "" << left << setw(14) << "Total" << right << setw(10) << your_d << setw(10) << their_d << endl; cout << "-------------------------------------------------------------" << endl; cout << setw(41) << "" << setw(10) << "Net Pay" << setw(10) << salary - your_d << endl;

return 0;

}

Format: SummaryManipulator Description One-

time use

fixed Sets output mode to fixed, all floating-point numbers displayed in fixed format

No

scientific Sets output mode to fixed, all floating-point numbers displayed in scientific notation

No

setprecision(n) In default mode, sets number of digits displayed. In fixed and scientific mode, sets number of decimal places displayed.

No

setw(n) Sets the width, in characters, of the next field to be displayed. Pads extra space with the space key.

Yes

left When setw is used, tells C++ to put extra spaces on the right side of the expression.

No

right When setw is used, tells C++ to put extra spaces on the left side of the expression.

No

computer science 1620 formatting. suppose you work for the hr dept. of a company you wish to write a...

Documents

float cpp

float ei

float pension

float employee

float employer

tax cpp ei pension

employer slide

health care slide