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51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
/*This is a C++ Program to generate random numbers using Park-Miller algorithm. A general formula of a random number generator (RNG) of this type is:
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X_{k+1} = g X(k) mod n
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where the modulus n is a prime number or a power of a prime number, the multiplier g is an element of high multiplicative order modulo n (e.g., a primitive root modulo n), and the seed X0 is co-prime to n.*/
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#include <iostream>
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#include <math.h>
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#include <stdlib.h>
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using namespace std;
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const long m = 2147483647L;
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const long a = 48271L;
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const long q = 44488L;
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const long r = 3399L;
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static long r_seed = 12345678L;
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double uniform()
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{
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long hi = r_seed / q;
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long lo = r_seed - q * hi;
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long t = a * lo - r * hi;
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if (t > 0)
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r_seed = t;
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else
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r_seed = t + m;
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return r_seed;
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}
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int main(int argc, char **argv)
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{
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double A[10];
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for (int i = 0; i < 10; i++)
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A[i] = uniform();
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cout<<"Random numbers are:\n";
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for (int i = 0; i < 10; i++)
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cout << A[i]<<endl;
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}
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/*
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Random numbers are:
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1.08525e+009
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5.0826e+008
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1.35229e+009
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1.56324e+009
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8.90733e+008
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1.81003e+009
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1.50959e+009
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8.62973e+008
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1.85299e+009
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6.77684e+008
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