Advanced File Input and Output

Summary: This lab reinforces formatted input using files and introduces and binary file I/O.

Formatted I/O

1. Download and compile, state-year.c. (Note: Do not download the data file yet.)
   1. Run the program. Try to generate at least three different kinds of error messages.
   2. Download the accompanying data file state-income.txt. Run the program for a few valid years and ensure you understand how it works.
2. Using state-year.c as a template, write a program state-year-decrease.c which prints for each state, each pair of years for which the median income decreased. For example,

   ./state-year-decrease

   United States        
   Alabama               1992-1993
   Alaska                1996-1997 1991-1992 1990-1991 1985-1986 1984-1985 1981-1982
   Arizona               1992-1993 1982-1983
   Arkansas              1995-1996 1992-1993
   California            1992-1993
   Colorado             
   Connecticut          
   Delaware              1994-1995 1992-1993
   ...

   Be sure you cite the origins of your derivative work and clarify which portions are original to your new program and authored by you.

Binary I/O

Image I/O

2. Write a program that instructs the robot to take a picture and then writes the struct with the picture data to a file using fwrite.
3. Write a program that uses fread to read the binary data for a picture struct and the uses rDisplayPicture from the MyroC header to display the picture.

General Data I/O

4. Write a program called intwrite.c that reads in a series of integers from standard input using any method you prefer. The program should then imediately write these integers to a binary file of your choosing using fwrite.
5. Write a companion program called intread.c that reads in integers from the binary file and writes them each on a new line to stdout.