Objective: write a program that provides a custom handler for the interrupt signal.

• Write a C program prime that uses a brute force approach to find prime numbers.
• prime needs to keep track of the largest prime number found so far.
• Use the signal() function to provide a custom handler for the SIGINT signal.
• When Ctrl-C is pressed, prime needs to do the following:
  • Print the largest prime number found so far;
  • Prompt the user whether to quit;
  • Accept exactly one character as the input without requiring the user to press Enter;
  • Quit if the user presses y or Y.
• Typical output generated by prime will look as follows:

$ prime
17     Quit [y/n]? n
271    Quit [y/n]? z
521    Quit [y/n]? N
1061   Quit [y/n]? n
1783   Quit [y/n]? y
$

• A single C source code file with your work.
• A screenshot (in PNG or JPG format) showing the output of prime.