Programming in C
Programming in C
4th Edition
ISBN: 9780321776419
Author: Stephen G. Kochan
Publisher: Addison-Wesley
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Chapter 11, Problem 5E

Write a function called b that takes two arguments: an u and a bit number n. Have the function return 1 bit number n if it is on inside the word, and 0 if it is off. Assume that bit number 0 references the leftmost bit inside the integer. Also write a corresponding function called b that takes two arguments: an u and a bit number n. Have the function return the result of tinning bit n on inside the integer.

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Part 1: Write a function factorialFunc(n) that gets the positive integer n and calculates n! n! = n*(n-1)* (n-2)* (n-3) … * 3 * 2 * 1; Part 2: sin(x) can be approximately calculated using the following formula, where n! is factorial(n) – for example 3!=3*2*1 = 6 (the function in previous problem). The more terms we use in the series, the higher will be accuracy of the calculations. By using infinite terms in the series we will have the exact value. Write a program that gets x and calculates sin(x) using 5, 10, 20 terms, using C++
Write a function int Factorial(int n) to calculate factorial of n. If n is non negative then it return factorial, otherwise it display a proper error message and return -1.
A company wants to transmit data over the telephone but is concerned that its phones may b tapped. It has asked you to write a program that will encrypt the data so that it may be transmitted more securely. All the data transmitted is 4 digit integers. Your program should read a four digit integer entered by the user and calls a function encrypt which takes four digits as arguments and encrypt it as follows . Replace each digit with the result of adding 4 to the digit and getting the remainder after dividing the new value by 10. . Calls another function swap which swaps the first digit with the third, and second digit with the fourth using pass by reference. Then it prints the encrypted integer.

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