1) In mathematics, a factorial of a number is calculated by multiplying that number by all of the successive values less than it, stopping at 1. For example, factorial of 4 is written 4! and calculated as: 4! = 4 * 3 * 2 * 1 = 24 2) Write a program consisting of two functions (plus the main function). The first function should read in a number and then return this value back to the main function. This value should then be passed as a parameter (by value) into the second function which calculates and displays the factorial. Note: validate the input value (in the first function) to be greater than 1. 3) Improve your program from question 2, by changing the second function (that calculates the factorial) so that the result is returned to the main function instead of being printed where it is calculated. A new display function should be created and called from the main function that displays the calculated value. 4) Write a program that reads in two numbers and stores them into two variables a and b These values should then be passed into a function that swaps the values stored in the two variables (hint: use a temporary local variable). The values of the two variables should then be printed out (but not in the function where they are swapped). Note: you should use separate functions for each of the major steps in this program (i.e. input, processing, output). Remember, if you wish to pass two values out of a function, you will need to use pass by pointer parameters.
1) In mathematics, a factorial of a number is calculated by multiplying that number by all of the successive values less than it, stopping at 1. For example, factorial of 4 is written 4! and calculated as:
4! = 4 * 3 * 2 * 1 = 24
2) Write a program consisting of two functions (plus the main function). The first function should read in a number and then return this value back to the main function. This value should then be passed as a parameter (by value) into the second function which calculates and displays the factorial. Note: validate the input value (in the first function) to be greater than 1.
3) Improve your program from question 2, by changing the second function (that calculates the factorial) so that the result is returned to the main function instead of being printed where it is calculated. A new display function should be created and called from the main function that displays the calculated value.
4) Write a program that reads in two numbers and stores them into two variables a and b These values should then be passed into a function that swaps the values stored in the two variables (hint: use a temporary local variable). The values of the two variables should then be printed out (but not in the function where they are swapped). Note: you should use separate functions for each of the major steps in this program (i.e. input, processing, output). Remember, if you wish to pass two values out of a function, you will need to use pass by pointer parameters.
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