``Computer Literacy'' Assignment 4

1. Write a Fortran and a C program to read a file of numbers (one-per-record),
   do a bubble sort, and print the numbers.  The length of the file is not
   known in advance.
   Make a file of 10 numbers ("random" order) and use it as input to your 
   program.

2. Write a C function 
        float numbers( int n, TWICE, int ind)
   that allocates n units of float storage; and returns an array of
   length n that is filled with the numbers 2.0, 4.0, ..., 2.*float(n) if
   the optional argument TWICE is present and nonzero, and is filled with 
   the numbers 1.0, 2.0, ..., float(n) otherwise.
   Write a main program that initializes n to 10, calls numbers with
   the optional argument present and nonzero, prints the result, calls
   numbers with the optional argument absent, and prints the result.

3. Write a C function that accepts a floating point arguments x1 and
   x2, and an integer argument n and then uses SGI's GL to 
   plot sin(x) versus x for x = x1 to x2 by (x2-x1)/n.  Your routine should
   check to see that x2 is greater than x1 and "return gracefully" if it is
   not.  Test your routine with two or three choices of input values. 
   Use
     #include <GL/gl.h> 
     #include <stdlib.h> 
     #include <math.h> 
     #include "aux.h"
   For information on GL, see the README file in 
   /usr/people/4Dgifts/examples/glpg, and the examples in the various
   chapter subdirectories.
   There are man pages for the individual functions (not the auxiliary
   functions, but the others):
     man  glClearColor
   To compile and link, use something like
     cc $1.c -lgl_s -lc_s -o $1
   

Add an entry to your Web page for ``Assignment 4'', in which you give 
links to the source programs above.