Description
20 Points
This homework tests your understanding of the topics covered so far in C Programming –
Files, Strings, Arrays, Functions, etc.
In this assignment, you will write several functions as described below.
main
This function will call the random_number_file generator function. If the call is successful, it will
then call the hex_and_binary_file_generator function.
random_number_file_generator
This function creates a new text file for writing called randomNumbers.txt. The function will use
the rand() function to generate a number between 10 and 100. This will be the number of
numbers to be generated and written to the file. Then in a for loop generate (randomly) that
number of numbers, each number must be between 0 and 255 inclusive. Once a number is
generated use the fprint() function to write it to the randomNumbers.txt file. Don’t forget to append
a newline (‘\n’) to the string so that every decimal number is on its own line. Once the loop
completes close the file properly and return to the main function. This function must return 0 if
successful, 1 if something went wrong in the code.
convert_decimal_to_hex
This function takes a decimal number and converts it into hexadecimal string.
convert_decimal_to_binary
This function takes a decimal number and converts it into binary string.
hex_and_binary_file_generator
This function will open the randomNumbers.txt file for reading. It will also open a new file,
hexAndBinary.txt for writing. The basic process is to read in one line of text from
randomNumbers.txt. Use the fgets() function from stdio.h to read the string
(https://www.acm.uiuc.edu/webmonkeys/book/c_guide/2.12.html#fgets). Then use the atoi()
function from stdlib.h (https://www.acm.uiuc.edu/webmonkeys/book/c_guide/2.13.html#atoi) to
convert that string to a decimal number. Once you have the decimal number, check to make sure
it is between 0 and 255. If it is any other value you should print an error message to the screen
and fprintf() a message to the file as well: “Error, number too large|small\n”. If it is in the range
then first convert it to hex and to binary. This will be fprinted to the file hexAndBinary.txt in the
following format:
0x3A: 00111010 (58)
Call the convert_bin_to_hex and convert_dec_to_bin functions to convert the numbers to the
different formats. You will have two strings, one hex and one binary (byte) so your format should
look like this: “0x%s: %s (%d)\n” passing the arguments hex, byte, decimal number.
This will be done in a while loop that is looking for the marker to terminate the loop. Use
the feof() function for this purpose
(https://www.acm.uiuc.edu/webmonkeys/book/c_guide/2.12.html#feof). When the loop terminates
close the files properly and return to main.
The basic structure of your program should look like this:
/* Your header comments */
#includes
#defines
int main() {
create and initialize needed variables – remember to consider if they need to be defined here
or as locals in the other functions
call your randomNumber file generator
if no error call your hexAndBinary file generator
clean up if necessary
}
int randomNumber file generator (parameters) {
create and initialize variables
open file
for random number of times between 10 and 100
do the work
write to the file
}
clean up (close file)
}
int hexAndBinary file generator (parameters) {
create and initialize variables
open files
while not the end of the input file
read a number as a string and convert to decimal
call necessary functions to convert to hex and binary strings
write a composite string (as above) to the output file
} when done
close both files
}
void convert_decimal_to_hex (int decimalNo, char * hex) {
convert decimalNo into hex.
}
void convert_decimal_to_binary (int decimalNo, char * byte) {
convert decimalNo into a string of ‘1’s and ‘0’s (8)
}
Submission Instructions: Submit the code on Canvas under hw5 Submission link as
convert_files.c. Formatting, appropriate variable names, readability and commenting are all
considered while grading.
