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alkamid

Poland
27 Posts
Posted - 10/19/2010 :  08:18:03 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello,

Is something wrong with my code here?
if(exist(Bookg1) == 0)
{
	string litera$ = "g";
}
else
{
	if(exist(Bookj1) == 0)
	{
		string litera$ = "j";
	}
	else
	{
		if(exist(Bookm1) == 0)
		{
			string litera$ = "m";
		}
		else
		{
			if(exist(Booko1) == 0)
			{
				string litera$ = "o";
			}
			else
			{
				if(exist(Bookr1) == 0)
				{
					string litera$ = "r";
				}
				else
				{
					if(exist(Bookt1) == 0)
					{
						string litera$ = "t";
					}
					else
					{
						type -a "out of range";
					}
				}
			}
		}
	}
}
litera$=;

With the last command I get #Command Error!. Why?

larry_lan

China
Posts
Posted - 10/19/2010 :  10:18:00 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
You declare the variable, litera$, inside the brace, which means that you can only visit it within the scope of "{ }". You should have script like:

string litera;
if(...)
{
litera$ = "g";
}
else
{
...;
}
litera$ = ;

Larry
OriginLab
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alkamid

Poland
27 Posts
Posted - 10/19/2010 :  11:35:19 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I changed it to:
string litera;
if(exist(Bookg1) == 0)
{
	string litera$ = "g";
}
else
{
	if(exist(Bookj1) == 0)
	{
		string litera$ = "j";
	}
	else
	{
		if(exist(Bookm1) == 0)
		{
			string litera$ = "m";
		}
		else
		{
			if(exist(Booko1) == 0)
			{
				string litera$ = "o";
			}
			else
			{
				if(exist(Bookr1) == 0)
				{
					string litera$ = "r";
				}
				else
				{
					if(exist(Bookt1) == 0)
					{
						string litera$ = "t";
					}
					else
					{
						type -a "out of range";
					}
				}
			}
		}
	}
}
litera$=;


Unfortunately, it still doesn't work (there's no value assigned to litera$).
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larry_lan

China
Posts
Posted - 10/19/2010 :  11:42:16 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi:

You should not re-declare the variable again inside "{ }". Please see my example above, I didn't declare the variable inside IF statement. That is, I use "litera$ = "g";", NOT "string litera$ = "g";".

P.S, There is a chapter, Scope of Variables, in our LabTalk document. Maybe that will help.

Larry
Edited by - larry_lan on 10/19/2010 11:47:08 AM
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alkamid

Poland
27 Posts
Posted - 10/19/2010 :  11:45:02 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Of course, sorry for missing that and thank you for your patience and help. It works properly now.

Thanks!
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