Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Write a user defined function named: pwcheck that prompts the user to enter a password
and loops to password-check until user enters correct password. It prints the message of
You entered the right password!' on the screen if it matches the pre-defined global variable
PW (assuming PW='password';). It calls a subfunction in the loop to print an error message
if the password entered by user does not match the PW. The subfunction has a persistent
variable to count the number of times a mismatch has occurred.
Here is the sample output of calling the function: pwcheck
>> pwcheck
Please enter your password: abcdef
Error # 1: The password you entered does not match!
Enter your password: 123abc
Error # 2. The password you entered does not match!
Enter your password: password
Congratulation! You enter the right password!
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Transcribed Image Text:Write a user defined function named: pwcheck that prompts the user to enter a password and loops to password-check until user enters correct password. It prints the message of You entered the right password!' on the screen if it matches the pre-defined global variable PW (assuming PW='password';). It calls a subfunction in the loop to print an error message if the password entered by user does not match the PW. The subfunction has a persistent variable to count the number of times a mismatch has occurred. Here is the sample output of calling the function: pwcheck >> pwcheck Please enter your password: abcdef Error # 1: The password you entered does not match! Enter your password: 123abc Error # 2. The password you entered does not match! Enter your password: password Congratulation! You enter the right password!
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