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42 lines
810 B
C
42 lines
810 B
C
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/* For copyright information, see olden_v1.0/COPYRIGHT */
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/**********************************************************
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* poisson.c: handles math routines for health.c *
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**********************************************************/
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#include <stdio.h>
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#include <math.h>
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/* From health.h */
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#define IA 16807
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#define IM 2147483647
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#define AM (1.0 / IM)
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#define IQ 127773
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#define IR 2836
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#define MASK 123459876
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float my_rand(long idum)
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{
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long k;
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float answer;
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idum ^= MASK;
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k = idum / IQ;
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idum = IA * (idum - k * IQ) - IR * k;
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idum ^= MASK;
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if (idum < 0)
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idum += IM;
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answer = AM * idum;
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return answer;
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}
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int
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main(int argc, char** argv)
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{
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printf("my_rand(%d) = %g\n", 2555540, my_rand(2555540));
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printf("my_rand(%d) = %g\n", 2427763, my_rand(2427763));
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return 0;
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}
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