File: ring_buffer1.c

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

#define MAX 1000
#define SIZE 10

unsigned int sample()
{
  return random()%(MAX+1);
}

unsigned int ring_buffer[SIZE];

int main()
{
  unsigned index=0;

  while(1)
  {
    unsigned output;
    output=ring_buffer[index];
    printf("%u\n", output);
    assert(output<=MAX);

    ring_buffer[index]=sample();

    index=(index+1)%SIZE;
    assert(index<SIZE);
  }
}