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Diffstat (limited to 'usr.bin/learn/lib/eqn/L11.1a')
| -rw-r--r-- | usr.bin/learn/lib/eqn/L11.1a | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/usr.bin/learn/lib/eqn/L11.1a b/usr.bin/learn/lib/eqn/L11.1a new file mode 100644 index 00000000000..a03f703dabb --- /dev/null +++ b/usr.bin/learn/lib/eqn/L11.1a @@ -0,0 +1,46 @@ +#once #create message +.ND +.tr %$ +.EQ +delim $$ +.EN +.LP +We have introduced a fair number of "magic" words like +sub and sup and over and pi and sum. What happens if +you need to print an equation that contains one of these +words __as ____text, like this: +.EQ +e sub "pi" +.EN + +The way to turn off special meanings of magic words is +to enclose them in the double quotes "...". The $e sub "pi"$ +was printed with + .EQ + e sub "pi" + .EN + +Using this knowledge, modify file "Example" so it produces output +that looks like the following, then type "ready". +.pl 1 +#once #create Ref +.LP +.EQ +lim "sup" f( "pi" ) = p cdot i +.EN +.pl 1 +#once #create Example +.LP +.EQ +lim sup f( pi ) = p cdot i +.EN +.pl 1 +# +#once neqn Ref | nroff >X1 & +#once neqn message Ref | nroff -T$term %s/tinyms - +#user +neqn Example | nroff >X2 +#cmp X1 X2 +#log +#next +11.1b 10 |