Formatting output with 'printf' in Perl

Question

I\'m trying to format my output to look like it\'s in columns. I\'m trying to use the printf function.

Here\'s what I have:

printf(\"%s %10s %12s %10s\\n         


        

Answer 1

You need to use the same numbers in the two formats:

printf("%3s %10s %15s %13s\n", "Qty", "Desc.", "Unit \$", "Total");

and

printf("%3d %10s %12.2f %10.2f\n", @quantity[$he], @selections[$he], @prices[$he], @prices[$he]*@quantity[$he])

Note that 12.2 means (12 digits + 1 point + 2 digits), which is why I wrote 15 in the first format. The same goes for the 13.

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Also note that you're accessing array elements incorrectly.

Instead of @quantity[$he] use $quantity[$he]. That is, replace the @ with a $.