Pseudo Randon Number Generator code??

Sat Apr 11, 2009 2:35 am

Hi,

I'm trying to use a simple PRNG C program but am having problems.

Could someone please run this code and let me know if it works and post the output. It should be working perfectly but I am having trouble with my compiler. Thanks

Code:: #include<stdio.h> #include<stdint.h> uint16_t rand16(); uint32_t rand32(); uint16_t n, userChosenValue = 0; //Change this for different seed values. uint16_t numberOfValues = 10; //Change this depending on your needs. uint32_t seed; uint32_t mlcg,p,q; uint64_t tmpseed; int main(){ /* Calculate and print a series of 16 bit random numbers */ seed = (uint32_t)(userChosenValue + 1); printf("16 Bit:\n\n"); for (n=0;n<numberOfValues;n++){ printf("%.4x\n",rand16()); } /* Calculate and print a series of 32 bit random numbers */ seed = (uint32_t)(userChosenValue + 1); printf("\n\n32 Bit:\n\n"); for (n=0;n<numberOfValues;n++){ printf("%.8x\t\t\n",rand32()); } return 0; } /* Return the next 32 bit random number */ uint32_t rand32() { tmpseed = (uint64_t)33614U * (uint64_t)seed; q = tmpseed; /* low */ q = q >> 1; p = tmpseed >> 32 ; /* hi */ mlcg = p + q; if (mlcg & 0x80000000) { mlcg = mlcg & 0x7FFFFFFF; mlcg++; } seed = mlcg; return mlcg; } /* Return low 16 bits of next 32 bit random number */ uint16_t rand16() { return (uint16_t)rand32(); }