50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/* This file is part of the sample code and exercises
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* used by the class "Advanced Programming in the UNIX
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* Environment" taught by Jan Schaumann
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* <jschauma@netmeister.org> at Stevens Institute of
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* Technology.
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*
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* This file is in the public domain.
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*
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* You don't have to, but if you feel like
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* acknowledging where you got this code, you may
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* reference me by name, email address, or point
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* people to the course website:
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* https://stevens.netmeister.org/631/
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*/
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/* This file is used to illustrate how to step through
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* a program at execution time using gdb(1).
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*
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* To this end, it contains a number of mistakes.
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*
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* See https://youtu.be/fOp4Q4mnTD4 for how to fix
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* them.
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*/
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/* The Fibonacci sequence is defined such that each number
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* is the sum of the two preceding ones. */
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#include <stdio.h>
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#include <stdlib.h>
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int
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fib(int i) {
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if (i == 0) {
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return 0;
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} else {
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return fib(i-2) + fib(i-1);
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}
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}
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int
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main(int argc, char **argv) {
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if (argc != 2) {
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printf("usage: %s num\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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printf("%d\n", fib(atoi(argv[1])));
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exit(EXIT_SUCCESS);
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}
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