Devise an algorithm to scan an input array a of n elements, and output all prime numbers in the array that contain digit 7. For example, given array 27, 7, 13,17, 31, 37, where prime number are 7, 13, 17,31,37, the program should output 7, 17, 37. Your solution should have a main algorithm and two sub-algorithms, let's call them prime(num) and has 7 (num). You may reuse the prime sub-algorithm of Ex 6. You do not need to verify (e.g. by tracing) it though because you did it in Ex 6. You need to trace your main algorithm and the has7() algorithm. You should provide pre- and post-conditions for all your 3 (sub)algorithms. Note that since the sub-program has7 is called several times, it's better that you use separate trace tables, one for each call. Hint, in has7(), you need a while loop. You may want to use a Boolean variable flag so that you can terminate the loop early as long as a 7 is detected. Flag can be initially true or false, depending on how you design the logic. For example, flag can be initially false, and one of the while conditions is that flag is false. When a 7 is detected, set flag to be true. This will terminate the loop. Finally return flag.
Devise an algorithm to scan an input array a of n elements, and output all prime numbers in the array that contain digit 7. For example, given array 27, 7, 13,17, 31, 37, where prime number are 7, 13, 17,31,37, the program should output 7, 17, 37. Your solution should have a main algorithm and two sub-algorithms, let's call them prime(num) and has 7 (num). You may reuse the prime sub-algorithm of Ex 6. You do not need to verify (e.g. by tracing) it though because you did it in Ex 6. You need to trace your main algorithm and the has7() algorithm. You should provide pre- and post-conditions for all your 3 (sub)algorithms. Note that since the sub-program has7 is called several times, it's better that you use separate trace tables, one for each call. Hint, in has7(), you need a while loop. You may want to use a Boolean variable flag so that you can terminate the loop early as long as a 7 is detected. Flag can be initially true or false, depending on how you design the logic. For example, flag can be initially false, and one of the while conditions is that flag is false. When a 7 is detected, set flag to be true. This will terminate the loop. Finally return flag.
Programming Logic & Design Comprehensive
9th Edition
ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter6: Arrays
Section: Chapter Questions
Problem 17RQ
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