A building security system has door locks that are opened by typing a four-digit access code into a keypad. The access code is validated by querying an Access object with the following interface: class Access public: void activate (unsigned code); void deactivate (unsigned code): bool isactive (unsigned code) const: Each employee is given a different access code, which is activated using the activate () function. When an employee leaves the company, his or her access code is deactivated using the deactivate () function. Implement the Access class specified above. Write a test program that does the following • Create an Access object. • Activate the codes 1234, 9999, and 9876. • Prompt the user for an access code. Read the code from the console. • Tell the user whether the door opened successfully. • Repeat the last two steps until the door opens. • Deactivate code that worked. Also, deactivate code 9999 and activate code 1111. • Repeat steps 3 and 4 until the door opens. Note: Use SET container in your solution. Feel free to add required members in the class.
A building security system has door locks that are opened by typing a four-digit access code into a keypad. The access code is validated by querying an Access object with the following interface: class Access public: void activate (unsigned code); void deactivate (unsigned code): bool isactive (unsigned code) const: Each employee is given a different access code, which is activated using the activate () function. When an employee leaves the company, his or her access code is deactivated using the deactivate () function. Implement the Access class specified above. Write a test program that does the following • Create an Access object. • Activate the codes 1234, 9999, and 9876. • Prompt the user for an access code. Read the code from the console. • Tell the user whether the door opened successfully. • Repeat the last two steps until the door opens. • Deactivate code that worked. Also, deactivate code 9999 and activate code 1111. • Repeat steps 3 and 4 until the door opens. Note: Use SET container in your solution. Feel free to add required members in the class.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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please use the c++ to answer the following question
Transcribed Image Text:A building security system has door locks that are opened by typing a four-digit access code into a keypad. The access code is validated by querying an Access object with the following interface:
class Access
public:
void activate (unsigned code);
void deactivate (unsigned code);
bool isactive (unsigned code) const:
Each employee is given a different access code, which is activated using the activate () function. When an employee leaves the company, his or her access code is deactivated using the deactivate () function.
Implement the Access class specified above. Write a test program that does the following:
• Create an Access object.
• Activate the codes 1234, 9999, and 9876.
• Prompt the user for an access code. Read the code from the console.
• Tell the user whether the door opened successfully.
• Repeat the last two steps until the door opens.
Deactivate code that worked. Also, deactivate code 9999 and activate code 1111.
• Repeat steps 3 and 4 until the door opens.
Note: Use SET container in your solution. Feel free to add required members in the class.
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