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) {
        for(int i=0;i<n;i++)
        {
            if(cb->count == 0)
            {
                printf("NULL");
            }
            else
            {
                printf("%d", cb->buffer[cb->tail]);
                cb->tail = (cb->tail+1) % 10;
                cb->count--;
            }
            
            if(i<n-1)
            {
                printf(" ");
            }
            //cb->count--;
        }
        printf("\n");
        printf("Tail: %d", cb->tail);
    return;
}

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