USE C language

Description: In this lab you will write a program that will contain two functions, setlsbs() and getlsbs(). These functions will use bitwise operators to embed and extract "hidden" bits in a character array.

Background Preparation:

Review bitwise operators (Section 2.9 in textbook).

Specifications: Your first function:

void setlsbs(unsigned char *p, unsigned char b0)

will take as parameters, an array p of eight bytes (unsigned char) and a byte byte0. It will replace the least significant bits (LSBs) of p by the bits of byte0. In other words, if the binary representation of byte0 isb₇b₆b₅b₄b₃b₂b₁b₀, you should replace the LSB of p[0] by b₀, the LSB of p[1] by b₁, ... , and the LSB of p[7] by b₇.

Your second function:

unsigned char getlsbs(unsigned char *p)

will take an array p of eight bytes (unsigned char) and return a byte byte0 which is created by combining the LSBs of p. That is, your function should combine the least significant bits b_i of p[i] to return a byteb₇b₆b₅b₄b₃b₂b₁b₀.

Write a program to test your functions as follows:

Obtain a random number seed from the command line of your program using command line arguments.

Initialize an array p of 8 unsigned char with random numbers from 0 to 255

Initialize a separate unsigned character byte0 with a random number.

Print the values in the array p as well as the value for byte0.

Print the values in decimal format as well as binary format (use macros defined below)

Call setlsbs() using p and byte0 as parameters

After the call to setlsbs() is completed, print the modified values of the array p.

Print the values in decimal format as well as binary format (use macros defined below)

Use the modified array p as a parameter to getlsbs()

Print the return value of the call to getlsbs(). The returned value should match the original value for byte0

Print the value in decimal format as well as binary format (use macros defined below)

You will create a Makefile to compile and link your program. Your program filename should be Lab6_<username>_<labsection>.c Macros: You may use the following macros to print the binary representation of unsigned character variables:

#define BYTETOBINARYPATTERN "%d%d%d%d%d%d%d%d"

#define BYTETOBINARY(byte) \ (byte & 0x80 ? 1 : 0), \ (byte & 0x40 ? 1 : 0), \ (byte & 0x20 ? 1 : 0), \ (byte & 0x10 ? 1 : 0), \ (byte & 0x08 ? 1 : 0), \ (byte & 0x04 ? 1 : 0), \ (byte & 0x02 ? 1 : 0), \ (byte & 0x01 ? 1 : 0)

#define PRINTBIN(x) printf(BYTETOBINARYPATTERN, BYTETOBINARY(x));

You can use the macros in a manner similar to the code below: unsigned char num =173;

PRINTBIN(num); printf(" ");