SCR_public/23SCR/SCR08/SCR8.txt

1/

a)

x=7;for ((i=1;i<=x;i++)); do echo $i; done

b)

#!/bin/bash
if [[ $# -lt 1 ]]
then
	echo " Usage : $0 "
	exit
fi
 if [[ $1 -lt 0 ]]
 then
 	echo " Argument must be positive ! "
    exit
fi
for (( i=1 ; i<= $1 ; i++))
do
	echo $i
done
exit

2/

#!/bin/bash

if [[ $# -lt 2 ]]
then
	echo " Usage : $0 <NUM_ARG1> <NUM_ARG2>"
	exit
fi
if [[ $1 -lt 0 ]]
 then
 	echo " Arg1 must be positive ! "
    exit
fi
if [[ $2 -lt 0 ]]
 then
 	echo " Arg2 must be positive ! "
    exit
fi
if [[ $1 -gt $2 ]]
 then
 	echo " Arg1 must be less than Arg2 !"
    exit
fi
for (( i = $1 ; i <= $2 ; i++))
do
  for (( j = $1 ; j <= $2 ; j++))
  do
  	echo -n $(( i * j ))
  	echo -ne $"\t"
  done
  echo -e $"\n"
done
exit

3/

a)

#!/bin/bash
if [[ $# -lt 2 ]]
then
  echo " Usage : $0 <SCR_FILE> <DEST_FILE>"
  exit
fi
if [[ ! -f $1 ]]
then
  echo " FILE $1 Does not exist!"
  exit
fi
if [[ -f $2 ]]
then
  echo -n " FILE $2 already exists. Overwrite ? Yes/No --> "
  read answer
  if [[ $answer != "Yes" ]]
  then
    exit
  fi
  cp /dev/null $2
fi
for addr in $(cat $1)
do
  x=$(expr substr $addr 1 8)
  y=$(expr substr $addr 9 8)
  z=$(expr substr $addr 17 8)
  t=$(expr substr $addr 25 8)
    echo "$((2#$x)).$((2#$y)).$((2#$z)).$((2#$t))" >> $2
done
exit


b)

1) read x; echo "$? x=$x" affiche : 0 x=7

2) read x; echo "$? x=$x" affiche : 0 x=

3) read x; echo "$? x=$x" affiche : 1 x=

read permet d'initialiser une valeur dans une variable