userspace/test_math.c


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#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

int main(int argc, char **argv) 
{
     time_t ltime;
     time(&ltime); 
     printf("the time is %s", ctime(&ltime));

     unsigned int seed=time(NULL);
     printf("seed = %u\n",seed);

     srand(seed);

     for(int i=0;i<10;i++)
     {
	 int r=rand()%100;
	 printf ("the random number is %i",r);
	 printf("sin(%i) = %f \n",r,sin(r));
     }


     return 0;
}