Note1: argument1 < argument2
Note2: a prime number is evenly divisible only by itself and 1

/* program to print out all of the prime numbers between
and including two specified integer values  */

/* command line: primes start stop  */

#include <stdio.h>

void main(int argc, char *argv[])
{
 int start, stop, num, i, isprime;

 if(argc != 3)  /* incorrect command line */
   {
    printf("Expected command line is: primes start stop\n");
    printf("where start < stop and both are positive integers\n");
    exit(0);
   };
 
  start = atoi(argv[1]); /* convert to integers */
  stop  = atoi(argv[2]);

  if(start > stop || start < 1) /* check input values in range */
   {
    printf("start or stop out of range\n");
    printf("Expect start < stop and both positive intergers\n");
    exit(0);
   };

  num = 0; /* initialize the prime count */

  if(start==1) /* check for start = 1 */
   {printf("%d is a prime\n",start);
    num++;
    if (stop>start) start++;
   };
  if(start==2) /* check for start = 2 */
   {printf("%d is a prime\n", start);
    num++;
   };
  if(start%2 == 0) start++; /* increment to next odd integer */
    while(start <= stop)
      {
       i = 3; isprime = 0;
       while(i < start)
         {
          if(start%i == 0) isprime = 1;  /* not prime */
          i+=2;
         };
       if(isprime==0)
         {
          printf("%d is a prime number\n", start);
          num++;
         };
       start+=2;
      };
   if(num==0) printf("no prime numbers found\n");
 }
 

2) (25 points) Complete the following program by writing the needed drawDiamond function.

/* OpenGL Program to Draw a Diamond */

#include <stdio.h> /* definitions for standard I/O routines */

#define WIDTH 600 /* window dimensions */

/* Clear the screen and draw a blue diamond (a square rotated 45 degrees) that

void drawDiamond()

/* Main program to draw the diamond and wait for quit */

void main(int argc, char* argv[])

3) (10 points)
 

    Change glClearColor(1,1,1,0) to glClearColor(1,1,0,0)

(b) How would you modify the program above to use a window 400 units wide and 300 units high?

Change the definitions to:

    #define WIDTH 400

glutCreateWindow("Color Gradient");

(d) How would you modify your drawDiamond function to draw a diamond which is blue at the top and bottom vertices but is red at the middle vertices?

Modify the function as shown below by adding additional glColor3f() function calls.

glColor3f(0,0,1);

4) (10 points) Write the UNIX commands to do the following:
 

mkdir /u/gromit/examples/src

or

cd /u/gromit/examples

b) Remove all files whose names end with ".o" in the current directory

rm *.o

c) List all files in the subdirectory "progs" that have names which include the string "exp" and that end with ".c"

ls progs/*exp*.c

d) In the current directory, find all occurrences of the word "smile" in all files whose names contain the string "txt".

grep "smile" *txt*

or

awk '/smile/' *txt*

e) Move the subdirectory "astro" in your current directory up one level in the directory structure.

mv astro ..

5) (25 points) Write a shell script to do the following for the sequence of files starting with the file "frame.14.img" and ending with the file "frame.35.img" in your home directory:

a) copy all the files in this sequence into the directory "/n/gromit/viza652/images"

# midterm problem 5 shell script

set ccount = 0

while($num <= 35)

cd /n/gromit/viza652/images

set filelist = `ls -C1`

while($fcount <= $#filelist)

@fcount = $fcount - 1

echo $ccount "files copied"

echo $fcount "files renamed"