Due: November 25, 2019
You can turn this in late, until Monday, December 2 (the day school resumes after Thanksgiving), for 80% of your score (that is, a 20% deduction).
Please put the answers to these two questions in a text file called linux.txt or a PDF file called linux.pdf.
The next step is to transform the board into the next generation. Each tranformation is a step. Recall the rules are as follows. Each square on the board may be populated (indicated by an ‘O’) or unpopulated (indicated by an ‘X’). The neighbors of a cell are the cells that adjoin it vertically, horizontally, or diagonally. At each step, the following transformations are applied to all the cells.
program will take the file with the predetermined pattern as its only argument. It is to print out the initial board (generation 0), and run for 50 generations (steps), printing out the board every 5 generations (so it should print generations 0, 5, 10, …, 50).
As an example, given the input file containing:
XOX XOX XOX
he output boards would be (ellipses indicate omitted output):
Generation 0: ----- |XOX| |XOX| |XOX| ----- Generation 5: ----- |XXX| |OOO| |XXX| -----
Generation 50: ----- |XOX| |XOX| |XOX| -----
As before, the board dimensions will never be more than 100 rows and 100 columns.
The output is to be written to the standard output. If there are no problems, your program is to return an exit status code of 0; otherwise, it is to return an exit status code of 1. Successful output looks as above. The following are the error messages:
if (p == NULL) perror(s); …where p holds the return value of malloc and s is the string you are saving in the allocated space.
fprintf(stderr, "Usage: %s board_pattern\n", argv);
perror(fname);where fname is the name of the file that you were trying to open.
fprintf(stderr, "%s: line %d is wrong length\n", fname, lineno);where fname is the name of the file and lineno is the line number of the bad line.
fprintf(stderr, "%s: bad character ’%c’ in line%d\n", fname, ch, lineno);where fname is the name of the file, ch is the invalid character, and lineno is the line number of the bad line.
To turn in: Put this program into a file called life3.c; turn it in as directed below. If you want to submit two files, that is, have this in a separate file, call the main one life3.c and the other file(s) init3n.c, where n is a single digit (for example, init30.c). Turn it in to Gradescope; you can do this as many times as you like, up to the due date, and we will grade the last one you submit.
The integers must be positive. For example, running
life3ex -n 100 -p 10 boardwould begin with the pattern in board, run it for 100 generations, printing every 10th one (that is, it would print generations 0, 10, 20, …, 10, where generation 0 is the initial configuration). Always print the initial and final configurations.
In addition to everything for the program in life3.c, if either option is not followed by a number, use an fprintf of the following form:
fprintf(stderr, "%s: %c must be followed by a positive number\n", fname, option);where fname is the name of the file and option the option involved, and if a bad option is given, use an fprintf of the following form:
fprintf(stderr, "%s: %c: invalid option\n", fname, option);where fname and option are as above.
To turn in: Put this program into a file called life3ex.c and submit it to Gradescope.
ECS 36A, Programming and Problem Solving
Version of November 14, 2019 at 8:14PM
|You can also obtain a PDF version of this.|