Circular Buffer Read

Code

#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
    while (cb->count)
    {
        printf("%d", cb->buffer[cb->tail]);
        ++cb->tail;
        --cb->count;
        --n;

        if (n <= 0)
        {
            printf("\nTail: %d", cb->tail);
            break;
        }
        if (cb->count == 0)
        {
            for (int i = 0; i < n; i++)
            {
                printf(" NULL");
            }
            printf("\nTail: %d", cb->tail);
        }
        if (cb->tail >=  cb->capacity)
        {
            cb->tail %= cb->capacity;
        }
        printf(" ");
    }
}

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;
}

Solving Approach