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progs/fib.while
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Wed, 13 Nov 2013 20:07:26 +0000
changeset 189 04346d82fe01
parent 182 9ce2414e470e
child 207 f824e1331fc6
permissions -rw-r--r--
added cw1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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/* Fibonnacci numbers implemented in
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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   the WHILE language */
Christian Urban <christian dot urban at kcl dot ac dot uk>
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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write "Input a number ";
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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read n;
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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x := 0;   // start values
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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y := 1;
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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while n > 0 do {
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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  temp := y;
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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  y := x + y;
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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  x := temp;
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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  n := n - 1  // decrement counter
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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};
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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write "Result ";
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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write y
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Christian Urban <christian dot urban at kcl dot ac dot uk>
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    16
 














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