Name
Department
Birth Date
Date Hired
Annual Salary
Office Phone Extension
You are to decide exactly how this information is to be stored in the
file. Design the layout of the file, and then create a sample data file in
this format to use when testing your program. The format of the file is
up to you. However, space is critical. Do not use any more characters
in your file than you have to! Your program is to read the information
from the file into a data structure, and then display a menu of options
for operations to be done on the data. You may not assume in your
program that you know the length of the data file. The menu options
are:
1. Print all of the information in an easy-to-read format to a new file.
2. Print the information for a particular department.
3. Calculate the total payroll for the company (the sum of the salaries).
4. Find out how many employees have been with the company for N
years (N might be 10, for example).
5. Exit the program.
Matlab
Ch9Ex31.m
% This script creates an employee data base for a company
% and performs some operations on the data
% Read the info from a file
employees = reademployees;
% Call a function to display a menu and get choice
choice = options;
while choice ~= 5
switch choice
case 1
% Prints all of the info to a file
printall(employees)
case 2
% Prints info for one department
printdept(employees)
case 3
% Prints total payroll
payroll([employees.salary])
case 4
% Prints employees >= N years
nyears(employees)
end
% Display menu again and get user's choice
choice = options;
end
reademployees.m
function emp = reademployees
% Function stub
emp(2).name = 'Smith, Jane';
emp(2).dept = 'Service';
emp(2).birth = '072267';
emp(2).hired = '121298';
emp(2).salary = 87333;
emp(2).phone = '5388';
emp(1).name = 'Smith, Joe';
emp(1).dept = 'Sales';
emp(1).birth = '072267';
emp(1).hired = '121288';
emp(1).salary = 77333;
emp(1).phone = '5389';
end
options.m
function choice = options
% options prints the menu of options and error-checks
% until the user pushes one of the buttons
choice = menu('Choose an option', 'Print all', ...
'Print dept', 'Payroll', 'N years', 'Exit Program');
% If the user closes the menu box rather than
% pushing one of the buttons, choice will be 0
while choice == 0
disp('Error-please choose one of the options.')
choice = menu('Choose an option', 'Print all', ...
'Print dept', 'Payroll', 'N years', 'Exit Program');
end
end
printall.m
function printall(emp)
% Write to screen; could change to write to file
fprintf('%-15s%-8s%11s%11s %-10s %5s\n\n', 'Name', 'Dept', ...
'Birth Date', 'Hire Date', 'Salary', 'Phone')
for i = 1:length(emp)
fprintf('%-15s%-8s', emp(i).name, emp(i).dept)
b = emp(i).birth;
birthdate = sprintf('%s-%s-19%s',b(1:2),b(3:4),b(5:6));
h = emp(i).hired;
hiredate = sprintf('%s-%s-19%s',h(1:2),h(3:4),h(5:6));
fprintf('%11s%11s', birthdate, hiredate)
fprintf(' $%9.2f x%s\n', emp(i).salary, emp(i).phone)
end
end
printdept.m
function printdept(emp)
choice = menu('Choose Dept', 'Sales', ...
'Service', 'Trucking');
% If the user closes the menu box rather than
% pushing one of the buttons, choice will be 0
while choice == 0
disp('Error-please choose one of the options.')
choice = menu('Choose Dept', 'Sales', ...
'Service', 'Trucking');
end
ca = {'Sales','Service','Trucking'};
chosen = ca{choice};
fprintf('%-15s%-8s%11s%11s %-10s %5s\n\n', 'Name', 'Dept', ...
'Birth Date', 'Hire Date', 'Salary', 'Phone')
for i = 1:length(emp)
if strcmp(emp(i).dept, chosen)
fprintf('%-15s%-8s', emp(i).name, emp(i).dept)
b = emp(i).birth;
birthdate = sprintf('%s-%s-19%s',b(1:2),b(3:4),b(5:6));
h = emp(i).hired;
hiredate = sprintf('%s-%s-19%s',h(1:2),h(3:4),h(5:6));
fprintf('%11s%11s', birthdate, hiredate)
fprintf(' $%9.2f x%s\n', emp(i).salary, emp(i).phone)
end
end
end
payroll.m
function payroll(salaries)
fprintf('The total of the salaries is $%.2f.\n\n', ...
sum(salaries))
end
nyears.m
function nyears(emps)
% Only considers years
hiredyears = zeros(1, length(emps));
for i = 1:length(emps)
hiredyears(i) = str2num(emps(i).hired(5:6)) + 1900;
end
current_year = 2013;
N = 20;
fy = find(current_year-hiredyears >= N);
fprintf('%d employees have worked at least %d years.\n\n', ...
length(fy), N)
end
need an explanation for this answer? contact us directly to get an explanation for this answer