numbers.c
author Markus Brökers <mbroeker@largo.homelinux.org>
Tue, 17 Aug 2010 18:57:57 +0200
changeset 139 cb1d3f4cf18e
parent 86 86b83a979d9e
child 140 05d42a3737a4
permissions -rw-r--r--
execve returns a value on error and this catches it
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#include <stdio.h>
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#include <stdlib.h>
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#define getrandom(max) (1+(int)((float)(max)*rand()/RAND_MAX+1.0))
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int main (void)
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{
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    while (1) {
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        int guess = -1, value = getrandom (100), count = 0;
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        do {
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            printf ("Enter a number: ");
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            if (scanf ("%d", &guess) < 0)
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                (void)getchar ();
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            else
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                count++;
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            if (guess != value)
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                printf ("X is %s than %d\n", (value > guess) ? "higher" : "lower", guess);
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        } while (value != guess);
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        printf ("SUCCESS: You got it after %d attempts\n", count);
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    }
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    return EXIT_SUCCESS;
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}