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(n--)
    {
        if(cb->count<=0) 
        {
            printf("NULL");
        }
        else
        {
            printf("%d",*(cb->buffer + cb->tail));
            cb->tail++;
            cb->tail = cb->tail%cb->capacity;
        }

        cb->count--;
        if(n) printf(" ");
    }
    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;
}

Solving Approach