Unix HW 4

Part I: (4 * 5 = 20 pts)

Five (4) exercises from Chapter 13

Exercises 13.1, 13.2(i), 13.4, and 13.24 pp. 401-403

Part II: Increment and Precedence (1 * 5 = 5 pts)

You are encouraged to do this manually first, then run the script to verify your answers.

This is a preview of your exam question, so it is important you understand.

a=-2; b=3; c=5

ans = $((++a - b++ * ++c))

echo "ans1==$ans, a==$a, b==$b, c==$c;

Output 1 _______________________________________________

a=-2; b=3; c=5

(( ans2 = --a + ++b % c-- ))

echo "ans2==$ans2, a==$a, b==$b, c==$c"

Output 2 _______________________________________________

a=-2; b=3; c=5

ans3=$(( ++b / a-- * - ++c ))

echo "ans3==$ans3, a==$a, b==$b, c==$c"

Output 3 _______________________________________________

a=-1; b=0; c=2;

(( r4 = ++a && b-- || -c--))

echo "ans4== $r4, a== $a, b== $b, c== $c"

Output 4 _________________________________________

a=-1; b=0; c=2

(( r5 = -a-- && -++b || c--))

echo "ans5== $r5, a== $a, b== $b, c== $c"

Output 5 _________________________________________