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1.1 ! root 1: #once #create message ! 2: .ND ! 3: .EQ ! 4: delim $$ ! 5: .EN ! 6: .LP ! 7: So far we have carefuly skirted around a potential ! 8: problem; maybe you've wondered about it. ! 9: Suppose we want to produce an equation that looks ! 10: like this: ! 11: .EQ ! 12: x sup { pi + 1 } ! 13: .EN ! 14: The superscript is complicated, in that it contains ! 15: both a $pi$ and a +1, which has to be separated ! 16: from the $pi$ by a blank. ! 17: But I already told you that a blank terminates ! 18: the superscript. What's going on? ! 19: ! 20: As the first step to finding out, will the input ! 21: equation ! 22: ! 23: x sup pi + 1 ! 24: ! 25: produce the output ! 26: ! 27: $x sup {pi + 1}$ ? ! 28: Answer yes or no. ! 29: (You can play with the file "Example" if you like.) ! 30: .pl 1 ! 31: #once #create Example ! 32: .LP ! 33: .EQ ! 34: replace me ! 35: .EN ! 36: .pl 1 ! 37: # ! 38: #once neqn message | nroff -T$term %s/tinyms - ! 39: #copyin ! 40: #user ! 41: #uncopyin ! 42: #match no ! 43: #log ! 44: #next ! 45: 5.1b
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