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 function that takes the current date and corrects the number of days, if it's wrong. The function must return true if the date passed to it is a valid date and false, if not. The main function uses the returned value to either print "Date validated", if a valid date was entered or "Invalid date entered. Changed to ", followed by the modified date.
For example: if given 11/31/2020, it will produce 12/1/2020. If given 2/29/2021, it will make it 3/1/2021. But, if 11/29/2020 is entered, it will not change it.
To check the date, the function uses the fact that months 4, 6, 9, 11 have 30 days, month 2 has 28 days in non-leap years and 29 in leap years and the remaining months have 31 days.
A year is a leap year if it's divisible by 400 or if not, it's divisible by 4, but not 100.
Example interaction between the user and the program:
Enter a date: 2/31/2021
Invalid date entered. Changed to 3/3/2021
Another example:
Enter a date: 12/32/2020
Invalid date entered. Changed to 1/1/2021
Another example:
Enter a date: 10/28/2020
Date validated.
Press any key to continue.
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