Thread: Playing with random numbers

That makes no sense.
FA?
4D?
Your current random number generator might start off like that, but everyone else sees different things.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
  char string1[30] = "hello"; 
  int length, myDivMod;
  unsigned int myRand;

  length = strlen(string1);

  srand(length);                // seed rand generator

  for (int i = 0; i < length; ++i) {
    myRand = rand();            // get random number
    printf("R1=%10u(%10x) ", myRand, myRand);
    myDivMod = myRand % length; // - length / 2;  // get mod of random number
    myRand = myRand / length;   //  should equal 6 with 4D random
    printf("R2=%10u(%10x) ", myRand, myRand);
    myRand = myRand * -1;       // negate mRand by * -1
    myRand = myRand + myDivMod;
    printf("R3=%10u(%10x)\n", myRand, myRand);
  }

  return 0;
}


$ ./a.out 
R1= 590011675(  232add1b) R2= 118002335(   708929f) R3=4176964961(  f8f76d61)
R1=  99788765(   5f2a7dd) R2=  19957753(   13087f9) R3=4275009543(  fecf7807)
R1=2131925610(  7f129a6a) R2= 426385122(  196a1ee2) R3=3868582174(  e695e11e)
R1= 171864072(   a3e7008) R2=  34372814(   20c7cce) R3=4260594484(  fdf38334)
R1= 317159276(  12e7776c) R2=  63431855(   3c7e4af) R3=4231535442(  fc381b52)