Homework 6
 Due Date Monday, May 5 Assignment [10 points] Do 7.9 from the textbook. [10 points] Do 7.10 from the textbook. [15 points] Write a function called circumference that calculates the circumference of a circle. You must pass the radius parameter by value, and a circumference parameter by reference. Do not use a return statement. a. Write the function prototype. b. Write a sample main() function. c. Write the actual function. [15 points] Determine the output of the following program: ```#include void super_swap (int *, int *, int *); main () { int a = 1; int b = 2; int c = 3; printf ("%d %d %d\n", a,b,c); super_swap (&a, &b, &c); printf ("%d %d %d", a,b,c); getchar(); } void super_swap (int *num1, int *num2, int *num3) { int temp1 = *num1; *num1 = *num2; *num2 = *num3; *num3 = temp1; } ``` [25 points]This question asks you to create an array for tracking credit card purchases. A. Create a structure, called creditcard that contains three members: credit_card_number (integer data type), authorization_number (integer data type) and amount_to_charge (float data type): B. Create an array called records, which contains 50 creditcard structures. C. Using three lines of code, initialize the data for records[25] to: credit_card_number = 4111111, authorization_number=56132 and amount_to_charge = 19.95. D. Create a pointer to creditcard and call it cardPtr. Initialize cardPtr to point to the zeroeth element of the records array. E. Using cardPtr defined above, initialize the data for records[0] to: credit_card_number=999121, authorization_number = 89532 and amount_to_charge = 99.95. F. Using cardPtr, print out all data contained in records[25]. [10 points] Given the following array: ```int numbers[5] = {2,4,6,8,10}; ``` A. Write a pointer to integer, called numPointer and initialize it to point to the zeroeth element of the numbers array. B. Assuming that numbers[0] is located at address 1,000 and that integers are 4 byte long, what is the value of numPointer? C. What is the value of numPointer+2? D. What is the value of *(numPointer+2)? [15 points] From the Text, Exercise 7.17