tests/arith3.sub

   1 RANDOM=42
   2 (( dice[RANDOM%6+1 + RANDOM%6+1]++ ))
   3 echo ${dice[5]}
   4
   5 (( ++dice[RANDOM%6+1 + RANDOM%6+1] ))
   6 echo ${dice[6]}
   7
   8 v=4
   9 DIND=20
  10
  11 (( dice[DIND%6 + 1]=v ))
  12 echo ${dice[3]}
  13
  14 RANDOM=42
  15
  16 (( dice[RANDOM%6+1 + RANDOM%6+1]+=v ))
  17 echo ${dice[5]}
  18
  19 (( dice[RANDOM%6+1 + RANDOM%6+1]-=v ))
  20 echo ${dice[6]}
  21
  22 (( dice[RANDOM%6+1 + RANDOM%6+1]+=2 ))
  23 echo ${dice[11]}
  24
  25 (( dice[RANDOM%6+1 + RANDOM%6+1]*=2 ))
  26 echo ${dice[11]}
  27
  28 unset dice1 dice2
  29 RANDOM=42
  30
  31 for i in {1..5000}; do ((dice1[$RANDOM%6+1 + $RANDOM%6+1]++)); done;
  32 unset t; for i in ${dice1[@]}; do ((t+=i)); done; echo $t
  33
  34 foo="${dice1[@]}"
  35
  36 RANDOM=42
  37
  38 for i in {1..5000}; do ((dice2[RANDOM%6+1 + RANDOM%6+1]++)); done;
  39 unset t; for i in ${dice2[@]}; do ((t+=i)); done; echo $t
  40
  41 bar="${dice2[@]}"
  42
  43 if [ "$foo" != "$bar" ]; then
  44         echo "random sequences differ"
  45 fi