C programming exercise a) Create a C program that asks the user to enter the first 12 digits of an..

C programming exercise a) Create a C program that asks the user to enter the first 12 digits of an ISBN-13, and displays the corresponding check digit.The program, however, is allowed to call the scanf(…) function only once. A sample interaction is shown below: Enter the first twelve digits of ISBN-13: 978030640615 Check digit: 7 Hint: To read single digits, well use scanf with the %1d conversion specification. Objective: Understanding expressions An International Standard Book Number (ISBN) is a unique number assigned to each book. ISBN-13 has thirteen digits in 5 parts which the last

C programming exercise a) Create a C program that asks the user to enter the first 12 digits of an ISBN-13, and displays the corresponding check digit.The program, however, is allowed to call the scanf(…) function only once. A sample interaction is shown below: Enter the first twelve digits of ISBN-13: 978030640615 Check digit: 7 Hint: To read single digits, well use scanf with the %1d conversion specification. Objective: Understanding expressions An International Standard Book Number (ISBN) is a unique number assigned to each book. ISBN-13 has thirteen digits in 5 parts which the last digit is check digit. The check digit is base ten, and can be 0-9. To compute a missing check digit, each digit, from the left to right, is alternatively multiplied by 1 or 3. Then, the sum of these products should be divided by 10 to find the remainder ranging from 0 to 9. Finally, the check digit can be found by subtracting the remainder from 10, that leaves a result from 1 to 10. For example, take the ISBN 978-0-306-40615-? : First calculate sum of products: 9_ + 7_ + 8_ + 0_ + 3_ + 0_ + 6_ + 4_ + 0_ + 6_ + 1_ + 5_ = 93 Remainder upon dividing by 10 is 3. Remainder is subtracted from 10. d) Check digit is 7 (10 – 3).