Due: Wednesday 10/27 8:00 am
GitHub Submission Link: git@github.com:mks65/11_randfile.git
Before Anything else, make sure to check the File Functions section of the notes page
Write a c program with the following features:
- A function that generates and returns a random number by reading in the correct number of bytes from
/dev/random
. - A
main
function that:- Populates an array with 10 random numbers generated by your random function.
- If your program seems to stall at this step, it’s possible that your computer doesn’t have enough entropy and is waiting, you can read from
/dev/urandom
instead.
- If your program seems to stall at this step, it’s possible that your computer doesn’t have enough entropy and is waiting, you can read from
- Prints out the contents of the array.
- Writes the array to a file
- Do not use a loop when writing to the file
- Reads that file into a different array
- Do not use a loop when reading from the file
- Prints out the contents of the second array to verify the random numbers are the same from step 1
- Populates an array with 10 random numbers generated by your random function.
- Remember to use good practices, like checking return values for errors
- Also remember to include a makefile that includes a separate run target
Sample output (yours may vary)
Generating random numbers:
random 0: 198116400
random 1: 2592608753
random 2: 2833624368
random 3: 3273750590
random 4: 3548697368
random 5: 3876828898
random 6: 2617393183
random 7: 1720936907
random 8: 682596330
random 9: 2411695830
Writing numbers to file...
Reading numbers from file...
Verification that written values were the same:
random 0: 198116400
random 1: 2592608753
random 2: 2833624368
random 3: 3273750590
random 4: 3548697368
random 5: 3876828898
random 6: 2617393183
random 7: 1720936907
random 8: 682596330
random 9: 2411695830