Programming Exercise Objective: In this lab assessment, you will demonstrate what you have learned with respect to o main() and other user defined functions o Macros o Pre-processor directives, Variables and libraries usage o C compiler practice o How to run C code effectively o Input validation and proper error message

Program #1: Write a small program: {(00_Numbers.c)} that:-

1. Prints the numbers from 1 to 100

2. If the number is a multiple of three, it should print instead I'm a multiple of 3!

3. If the number is a multiple of five, it should print instead I'm a multiple of 5!

4. If the number is a multiple of three and five, it should print instead I'm a multiple of 3 && 5!

This program should not take you more than 10 minutes to write. The following demonstrates the execution of the program:

#./00_Numbers

...

Abc [input validation required]

8 [A proper error message]

9 I'm multiple of 3!!!

10 I'm multiple of 5!!!

11 [A proper error message]

12 I'm multiple of 3!!!

13 [A proper error message]

14 [A proper error message]

15 I'm multiple of 3 && 5!!!

# echo $? [Macro utilization]

0 [returns zero]

SAMPLE TEST OUTPUT: 00_Numbers

Program #2:

Write a small C program: digits.c that:

5. Read an integer number from the command line using scanf( )

6. Find the number of digits in the number.

7. Prints the number of digits to the screen.

8. Finish with a value of 0.

The following demonstrates the execution of the program:

root@bahris:01_Lab# ./digits

Enter an integer: 8765

Number of digits in 8765 is 4

root@bahris:01_Lab# ./digits

Enter an integer: -98765

Number of digits in -98765 is 5

root@bahris:01_Lab# ./digits

Enter an integer: 123456789

Number of digits in 123456789 is 9

# echo $? [Macro utilization]

0 [returns zero]

SAMPLE TEST OUTPUT: digits

Program #3:

Write a small C program: reverse.c that:

9. Read an integer number from the command line using scanf( ).

10. Prints the number with its digits reversed to the screen.

11. Finish with a value of 0.

root@bahris:01_Lab# ./reverse

Enter an integer: 7654

The reversed number is 4567

root@bahris:01_Lab# ./reverse

Enter an integer: 78

The reversed number is 87

root@bahris:01_Lab# ./reverse

Enter an integer: 9870

The reversed number is 0789

# echo $? [Macro utilization]

0 [returns zero]

SAMPLE TEST OUTPUT:

Program #4: Write a small C program: bin2dec.c that:

12. Read a binary number (just 0 and 1) from the command line using scanf( ).

13. Prints the decimal number equivalent to the binary number entered.

14. Finish with a value of 0.

root@bahris:01_Lab# ./bin2dec

Enter a binary number: 1100

The decimal equivalent of 1100 is 12

root@bahris:01_Lab# ./bin2dec

Enter a binary number: 11101

The decimal equivalent of 11101 is 29

root@bahris:01_Lab# ./bin2dec

Enter a binary number: 10

The decimal equivalent of 10 is 2

SAMPLE TEST OUTPUT: bin2dec

Requirements:

2) You must implement all possible user input data verification.

3) Each function must have header comments that explain what it does, and describe/explain its inputs (if any) and return value (if any) and the code must be properly commented. Marking: