ex2 2

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• Type: sml
• Size: 685 B

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Functional Programming
└── Lab ML
    └── 0​328
        └── ex2 2.sml

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(*
Assume that we have a file with the following contents

abd
de
f

What does each command return, if issued repeatedly

val x = input(infile);
val x = input1(infile);
val x = inputN(infile,2);
val x = inputN(infile,5);
val x = inputLine(infile);
val x = lookahead(infile);
*)

val x = input(infile);
(* First time abc\nde\nf\n, Subsequent times, the empty string *)

val x = input1(infile);
(* a, b, c, \n, d, e, \n, f, then empty string *)

val x = inputN(infile,2);
(* ab, c\n, de, \nf, enpty string *)

val x = inputN(infile,5);
(* abc\nd, e\nf then empty string *)

val x = inputLine (infile);
(* abc\n, de\n, f\n, then empty string *)

val x = lookahead (infile);
(* Always a *)