CMSC104 Problem Solving & Computer Programming

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Make sure that you follow all the coding standards

• CMSC104 Coding Standards
• CMSC104 Indentation Styles
• CMSC104 Rubrics - How Not to Lose Points

Do the following to extend the Number to String Conversion Program :

Instead of reading in input from the keyboard, read in a value from a file, convert it into words, write it out to a different file.

• The name of the input file should be the first command line argument
• The name of the output file should be the second command line argument
• The input file will contain one value per line.
• Continue to read and process the input file until there are no more lines left to read.

Make sure to:

• Test whether the user passed in the two arguments. If not, print out "Usage: ./fileio input.txt output.txt", and exit the program.
• Make sure to test whether the files were opened correctly before reading/writing to them. If there was an error opening the file, exit the program.

Reference the following code examples :

• args.c
• file_io.c
• convertToString.c

From Linux on the GL machine:

• Write a C program (see below) and save it in a file called fileio.c in your ./CMSC104/cw5 directory
• Compile the program:     

  gcc -o fileio fileio.c

• Run the program to make sure it works:     

  ./fileio input.txt output.txt

• Use the SUBMIT utility to turn in the homework.     

  submit cs104_grasso cw05 fileio.c fileio