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



#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();
}