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43 lines
984 B
43 lines
984 B
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef TARGET_WINDOWS
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#define EXPORT_CSYM __declspec( dllexport )
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#else
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#define EXPORT_CSYM
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#endif
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EXPORT_CSYM int factorial(int n)
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{
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if ((n < 0) || (n > 30)) {
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return 0;
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} else if (n == 0) {
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return 1;
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} else {
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return n * factorial(n-1);
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}
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}
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int main(int argc, char *argv[])
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{
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int n;
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if (argc != 2) {
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fprintf(stderr, "Usage: %s number_string\n", argv[0]);
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return 1;
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}
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n = atoi(argv[1]);
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fprintf(stdout, "%d!=%d\n", n, factorial(n));
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return 0;
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}
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