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계산 스크립트의 루프까지

tag-icon • tag-icon bash shell-script
계산 스크립트의 루프까지

이것은 내 코드입니다.

if test $# -eq 2
then
    x=$1
    y=$2

echo "You entered "$x" for x and "$y" for y"
else
    if test $# -eq 1
    then
        x=$1
        echo -n "Enter a value for y. "
        read y
        echo
        echo "You entered "$x" for x."
        echo "You entered "$y" for y."
    else
        echo -n "Enter a value for x. "
        read x
            echo "You entered "$x"."
            echo
            echo -n "Enter a value for y. "
            read y
                echo "You entered "$y"."
    fi
fi
echo
((a=y+x))
echo "Your first and second number added together equals "$a"."
echo
((b=y-x))
echo "Your first and second number subtracted from each other equals "$b"."
echo
((c=y*x))
echo "Your first and second number multiplied together equals "$c"."
echo
((d=y/x))
echo "Your first and second number divided from each other equals "$d"."
echo
((e=y%x))
echo "Your first and second number have a remainder from division that equals "$e"."

그래서 내가 원하는 것은 if/then/else 문이 실행된 후 들어오는 요청을 반복한 다음 변수가 계산을 거치게 한 다음 들어오는 요청으로 다시 루프하는 것입니다.

그래서 이렇게 :

until [[ $yn == "n" ]]
    echo -n "Enter value for x. "
    read x
    echo -n "Enter value for y. "
    read y
    #The calculation steps in the code above.
    echo -n "Do you want to crunch some more numbers (y/n)? "
    read yn
done

내 문제는 else 뒤에 while 루프를 넣고 계산 함수를 포함하여 else 루프를 정상적으로 만들 수 있지만 처음 두 if/thes의 변수가 통과하지 못한다는 것입니다. 어떤 제안이 있으십니까?

- - - - - - - - - - - - - - 완전한

좋아, 목적을 달성하고 비슷한 문제가 있는 사람을 돕기 위해 여기에 제가 테스트한 수정된 코드가 있습니다. 나는 또한 각 기능에 대한 코드를 주석 처리했는데, 내 Linux 선생님이 이것을 좋아하므로 누구든지 잘못된 것을 발견하면 지적해 주시기 바랍니다.

#Keep looping the script until the user enters 'n' 
yn="not n"
until [[ $yn == "n" ]]
do
#Check if two inputs are supplied after the command
if test $# -ge 2
  then
  #Assign the two variables
    x=$1
    y=$2
    #Echo back what was entered for x and y
    echo "You entered "$x" for x and "$y" for y."
    echo
    #If two inputs weren't provided, check if one was
  elif test $# -eq 1
    #Assign the first argument to x
    then x=$1
    #Ask for y
    echo -n "Enter a value for y. "
    read y
    echo
    #Echo back what was entered for x and y
    echo "You entered "$x" for x."
    echo "You entered "$y" for y."
    echo
  #If neither one or two inputs were provided, ask the user for both
  else
    #Ask for x
    echo -n "Enter a value for x. "
    read x
    #Echo back what was entered for x
    echo "You entered "$x"."
    echo
    #Ask for y
    echo -n "Enter a value for y. "
    read y
    #Echo back what was entered for y
    echo "You entered "$y"."
    echo
fi
#Addition
((a=y+x))
echo "Your first and second number added together equals "$a"."
echo
#Subtraction
((b=y-x))
echo "Your first and second number subtracted from each other equals "$b"."
echo
#Multiplication
((c=y*x))
echo "Your first and second number multiplied together equals "$c"."
echo
#Division
((d=y/x))
echo "Your first and second number divided from each other equals "$d"."
echo
#Division giving a remainder
((e=y%x))
echo "Your first and second number have a remainder from division that equals "$e"."
echo
echo
#Set the number of arguments counted to zero to skip the first two variable checks on looping
while [ $# -gt 0 ]
   do
   shift
done
#Ask if the user wants to calculate another set of variables and loop back to asking for both inputs unless the user inputs 'n'
echo -n "Do you want to crunch some more numbers (y/n)? "
read yn
done

답변1

Until 루프에 모든 것을 넣을 수 있습니다. 마지막 매개변수를 제거합니다.

 #!/usr/bin/sh

 yn="not n"
 until [[ $yn == "n" ]]
    do

    #Your x/y definition script from above
    if test $# -ge 2
      then
        x=$1
        y=$2
        echo "You entered "$x" for x and "$y" for y"
      elif test $# -eq 1
        then x=$1
        echo -n "Enter a value for y. "
        read y
        echo
        echo "You entered "$x" for x."
        echo "You entered "$y" for y."
      else
        echo -n "Enter a value for x. "
        read x
        echo "You entered "$x"."
        echo -n "Enter a value for y. "
        read y
    fi

    #The calculation steps in the code above.

    # remove arguments before potentially repeating
    while [ $# -gt 0 ]
       do
       shift
    done

    echo -n "Do you want to crunch some more numbers (y/n)? "
    read yn
 done

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