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