IPC144- Workshop 5 Solved

In this workshop, you will code a C-language program with an object of structure type.  

 

LEARNING OUTCOMES 

Upon successful completion of this workshop, you will have demonstrated the abilities: 

•      to  store data of different types using a structure type 

•      to declare an object of structure type 

•      to access the members of an object of structure type 

•      to describe to your instructor what you have learned in completing this workshop 

 


IN-LAB: (30%) 
Download or clone workshop 5 (WS05) from https://github.com/Seneca-144100/IPC-Workshops   

Write your code for this segment in the emp_inlab.c file provided with the Visual Studio template project inside the in-lab folder. 

 

In this workshop segment, you will implement, Add and Display employee data functionality using C structs and arrays. 

OVERVIEW
The emp_inlab.c template file has the following already implemented instructions: 

•       Display a menu list as shown in the following inside a do-while loop construct:  

 

1.  Display Employee Information 

2.  Add Employee 

                        0. Exit 

•       Capture user input for the above options.  Store to an int variable named “option” 

 

 

•       Ability to iterate multiple menu choices (until 0 is entered) with required selection construct to direct process flow to the required logic/functionality (using switch).  Refer to the comments for each case to identify the functionality required. 

 

 

•       Display an error message for invalid menu option selections in the default case 

•       Initial output information for menu options 1 and 2 is provided with the relevant formatting. 

 

 

You are required to complete the following. 

 

-          Define the number of employees SIZE to be 2 using the #define directive and inserting it between the library directive and the main function definition (you will increase this value later) 

-          Declare a struct to represent employee data, which has the following information o An identification number stored in an int o Age stored in an int   o Salary stored in a double 

-          Declare an array of Employee struct’s named emp that can hold SIZE elements. 

Initialize all of the elements and their member variables to be 0. (Hint: You can assign    { {0} } to emp at the time of declaration). 

IMPLEMENT EXIT PROGRAM FUNCTIONALITY IN CASE 0
Print the exiting message. 

 

Exiting Employee Data Program. Good Bye!!! < 

IMPLEMENT DISPLAY FUNCTIONALITY IN CASE 1
•       Display the elements of the struct emp array.  Only display the valid employee data 

(“Employee ID, Employee Age and Employee Salary”).  Do not display any other data. Hint: If the identification number is positive, then it is valid employee data.  Use the following formatting in a printf statement: 

 

%6d%9d%11.2lf   ß→  (Employee ID, Employee Age and Employee Salary) 

 

•       After completing the display, enter a newline using a printf statement. 

IMPLEMENT ADD EMPLOYEE FUNCTIONALITY IN CASE 2
•       Keep track of the number of valid employees using an int variable. 

•       Check if the struct emp array is full.  

•       If the array is full, display the following error message. 

 

ERROR!!! Maximum Number of Employees Reached <
 

•     If the array is not full, accept new employee data (“Employee ID, Employee Age and Employee Salary”) as per the program output listed below and store that data in an empty element of the struct emp array. Increment the number of valid employees as required. 

PROGRAM COMPLETION
Your program is complete if your output matches the following output. Red numbers show the user’s input. 

 

---=== EMPLOYEE DATA ===--- 

 

1.  Display Employee Information 

2.  Add Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 111 

Enter Employee Age: 34 

Enter Employee Salary: 78980.88  

1.  Display Employee Information 

2.  Add Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 112 

Enter Employee Age: 41 

Enter Employee Salary: 65000 

 

1.  Display Employee Information 

2.  Add Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== ERROR!!! Maximum Number of Employees Reached 

 

1.  Display Employee Information 

2.  Add Employee 

0.  Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

111          34   78980.88 

112          41   65000.00 

 

1.  Display Employee Information 

2.  Add Employee 

0. Exit 

 

Please select from the above options: 0 

 

Exiting Employee Data Program. Good Bye!!!  

IN_LAB SUBMISSION: 

To test and demonstrate execution of your program use the same data as the output example above or any information needed. 

If not on matrix already, upload your emp_inlab.c to your matrix account. Compile and run your code and make sure everything works properly. 

Then run the following script from your account and follow the instructions (replace profname.proflastname with your professors Seneca userid and replace SAA with your section): 

 

~profname.proflastname/submit 144SAA_w5_lab <ENTER  

 
 

AT_HOME: (30%) 
Copy all of the in-lab code into the “emp_athome.c” file, which you will find in the at-home folder. Implement the following cases to emp_athome.c file.  

-          Change the value of SIZE to 4. 

-          Expand the menu list (printing) to include options 3 & 4 after option 2 with the following 

 

o   Update Employee Salary 

o   Remove Employee 

 

-          Create two switch-cases for option 3 & 4 after case 2. Do not forget to include break; statements at the end of each case. 

IMPLEMENT UPDATE EMPLOYEE DATA FUNCTIONALITY IN CASE 3 
 

        •     Display the following initially 

 

Update Employee Salary <     ====================== <
•       Prompt the user for the employee identification number using a do-while loop.  While the number is not found in the employee array, keep prompting the user. 

•       Once the number is found, display the current salary for the employee with that identification number and prompt the user to input the new salary. Replace the old salary with the input value. 

IMPLEMENT REMOVE EMPLOYEE FUNCTIONALITY IN CASE 4 
        •     Display the following initially 

 

Remove Employee <     =============== <
 

•       Copy and paste from case 3 the do-while loop that prompts the user for the employee identification number.   

•       Once the number is found, display the following message and change the employee identification number to indicate an empty slot.  

 

Employee [REPLACE WITH EMP ID] will be removed <
 

•       Decrement the valid employee count by one 

•       DO NOT REORDER the items in the array! 

PROGRAM COMPLETION
Your program is complete, if your output matches the following output. Red numbers show the user’s input. 

 

---=== EMPLOYEE DATA ===--- 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 5 

 

ERROR: Incorrect Option: Try Again 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 222 

Enter Employee Age: 22 

Enter Employee Salary: 22222.22 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 333 

Enter Employee Age: 33 

Enter Employee Salary: 33333.33 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 444 

Enter Employee Age: 44 

Enter Employee Salary: 44444.44  

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 555 

Enter Employee Age: 55 

Enter Employee Salary: 55555.55  

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== ERROR!!! Maximum Number of Employees Reached 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

222       22   22222.22 

333       33   33333.33 

444       44   44444.44 

555       55   55555.55 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 3 

 

Update Employee Salary 

====================== 

Enter Employee ID: 123 

*** ERROR: Employee ID not found! *** 

Enter Employee ID: 321 

*** ERROR: Employee ID not found! *** 

Enter Employee ID: 333 

The current salary is 33333.33 

Enter Employee New Salary: 99999.99 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

222       22   22222.22 

333       33   99999.99 

444       44   44444.44 

555       55   55555.55 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 4 

 

Remove Employee 

=============== 

Enter Employee ID: 789 

*** ERROR: Employee ID not found! *** 

Enter Employee ID: 987 

*** ERROR: Employee ID not found! *** Enter Employee ID: 333 

Employee 333 will be removed 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

222       22   22222.22 

444       44   44444.44 

555       55   55555.55 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0.  Exit 

 

Please select from the above options: 2 

 

Adding Employee 

=============== 

Enter Employee ID: 666 

Enter Employee Age: 66 

Enter Employee Salary: 66666.66 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 1 

 

EMP ID  EMP AGE EMP SALARY 

======  ======= ========== 

222       22   22222.22 

666       66   66666.66 

444       44   44444.44 

555       55   55555.55 

 

1.  Display Employee Information 

2.  Add Employee 

3.  Update Employee Salary 

4.  Remove Employee 

0. Exit 

 

Please select from the above options: 0 

 

Exiting Employee Data Program. Good Bye!!!  

AT-HOME REFLECTION (40%) 
Please provide answers to the following in a text file named reflect.txt. 

In three or more paragraphs, explain what you learned while doing this workshop.  Your answer should at least include the following: 

•       Using examples from this workshop to justify your point of view, discuss the advantages of using an array of structs versus parallel arrays when dealing with related data. 

•       In this workshop, the Employee struct is declared in the emp_athome.c file.  Where else could it have been declared and what advantages might it have [Hint: this is explained in the notes]?