86. Circular Buffer Read

#include <stdio.h>

typedef struct {
    int buffer[10];
    int head;
    int tail;
    int count;
    int capacity;
} CircularBuffer;

void read_bytes(CircularBuffer *cb, int n) {
    // Your logic here
    if(cb != nullptr)
    {
        for(int i=0; i < n; i++)
        {
            if(cb->count == 0)
            {
               i == n-1? printf("NULL"):printf("NULL ");
            }
            else
            {
               int val =  *(cb->buffer + cb->tail);
               cb->count--;
               cb->tail++;
               cb->tail %= cb->capacity;
               i == n-1? printf("%d",val) :  printf("%d ",val);
            }
        }
        printf("\nTail: %d",cb->tail);
    }


}

int main() {
    CircularBuffer cb = {
        .buffer = {10, 20, 30, 40, 50, 60, 70, 80, 90, 100},
        .head = 3,
        .tail = 7,
        .count = 6,
        .capacity = 10
    };

    int n;
    scanf("%d", &n);
    read_bytes(&cb, n);

    return 0;
}