Homework Answers

(iv) Write a function, computePrice that receives two parameters: the first one is a character variable indicating the size of the pizza (S, M or L) and the second an integer variable indicating the number of toppings on the pizza. It then computes the cost of the pizza and returns the cost as a floating point number according to the rules:

Small pizza = R50 + R5.50 per topping

Medium pizza = R70 + R6.50 per topping

Large pizza = R90 + R7.50 per topping

The post office needs a program that reads in postal address data and then displays the data in a neat format. • Declare four string variables name, addr1, addr2 and postalCode. • First, the main function of the program must input the data by means of a function called inputData. • Second, the main function calls the function displayData to display the name and address as follows: Mr R.S. Bopape P.O. Box 50741 Sandton 2146

(iii) Write a function void rectangle(int w, int h) to print an open rectangle of asterisks (*). The parameters w and h are the width and the height of the rectangle, expressed in number of asterisks

(ii) Write a void function that receives four int parameters: the first two by value and the last two by reference. Name the formal parameters n1, n2, sum and diff. The function should calculate the sum of the two parameters passed by value and then store the result in the first variable passed by reference. It should calculate the difference between the two parameters passed by value and then store the result in the second parameter passed by reference. When calculating the difference, subtract the larger value from the smaller value. Name the function calcSumAndDiff.

(i) Write a function that returns the cube of the integer passed to it. For example cube(2) will

return 8 and

cube(3) will return 27.

Find the error(s) in each of the following program segments and explain how the error(s) can be corrected:

vi) float calculateSquare(float number) { return number * number; }

Find the error(s) in each of the following program segments and explain how the error(s) can be corrected:

(v) void theProduct() { int a; int b; int c; int result; cout << “Enter three integers “ << endl; cin >> a >> b >> c; result = a * b * c; cout << “Result is “ << result << endl; return result; }

Find the error(s) in each of the following program segments and explain how the error(s) can be corrected: 

(iv) void aFunction(float a) { float a; cout << a << endl; }

Find the error(s) in each of the following program segments and explain how the error(s) can be corrected: 

(iii) int computeProd(int n) { if (n == 0) return 0; else } n * computeProd(n – 1)