Use array variable in as argument to command [closed] - arrays

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I have to use an array in a command that is stored in a variable:
# Array
DOMAIN="${DOMAIN:-example.com}";
GETIP=$( dig +short "${DOMAIN}" ) # No output
The following command is working:
dig +short example.com

I can not reproduce your problem:
DOMAIN="${DOMAIN:-example.com}";
GETIP=$( dig +short "${DOMAIN}" )
echo "$GETIP"
Output:
93.184.216.34

The problem was that I used the Variable outside of the scope.

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TSQL: I have one basic querying problem qr [closed]

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Query:
DECLARE #Patd_base nvarchar(50) = '‪axx';
PRINT #Patd_base
Output is
?axx
Why is the ? in the output? What does it mean?
Thanks for the help!
I believe you copied and pasted the value 'axx' from elsewhere. It has a hidden extended character in it.
When I copy/pasted your command above into Notepad++, and converted to ANSI encoding, I got '‪axx'

Set variable 2 equals to variable 1 [closed]

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I thought this would be quite simple task, but I can figure out how to do it
I'm trying to set variable 2 equals to variable 1
set var1=xxx
echo %var1%
set %var2%=%var1%
echo %var2%
My goal is of course to see xxx as output the second time, but instead I get an error "The syntax of the command is incorrect."
Could anyone point me in the right direction?
/L
Change set %var2%=%var1% to set var2=%var1%.

printf("%f",5/4) in C language returns 0.00000 unexpectedly [closed]

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it prints out 0.000000
I expected 1.2500000000
Why is it happening?
You are doing integer division by 5/4 and trying to print the result in float. So the behavior is ambiguous. You can try this to get the desired result:
printf("%f",(float)5/4);

undefined reference to <function name> in the same project file [closed]

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Closed 6 years ago.
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I'm using codeblocks IDE and I don't know what is the problem.
I tried making the variables global but it still doesn't work.
The problem is in the function name. Calculate_area has a capital 'C' in its function declaration name, but not in the prototype declaration.
Change your function declaration at line 31 with:
unsigned long calculate_area(unsigned long side);

C:#define inside function body [closed]

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Closed 9 years ago.
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# define a 10
main()
{
#define a 50
printf("%d",a);
}
The output is coming 50. Why is it happening so? Shouldn't the output come 10?
Compilation happens from top to bottom. so value of a is replaced by 50 when it enters into main function.
Here the local has precedence than global

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