Trouble with Errors on Unix sh with if statements-CodePudding

I am having a problem with the code below with if statements. It has three different arguments, I'm not sure if one or all of them are wrong.

#!/bin/sh


1=C
2=S
(1/2)=C  <---- This might be a problem

if [ $1 == "C*" ]
then
    echo "The city is:"

else [ $2 ==  "S*" ]
then
    echo "The state is:"

else [ $1 -a $2 == "B*" ]
then
    echo "The city and state is:"

else [ $1 -o $2 -ne "C*" "S*" "B*" ]
then
    echo "Not found!"
fi
    echo End of script

CodePudding user response：

Using numbers as variables is very unwise idea. Numbers are used to represent command line parameters.

Also this construction is AFAIK unknown to bash: (1/2)=C

Also this construction:

else [ $2 ==  "S*" ]
then

is wrong, should be some something like:

elif [ $2 ==  "S*" ]
then

Also this:

else [ $1 -o $2 -ne "C*" "S*" "B*" ]

is odd, you use -ne which is for compare numbers, for strings use !=

And also a lot of other errors/problems challenging constructions I have no time to mention.