87. Peek N Bytes from Circular Buffer

#include <stdio.h>

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

// Write your logic inside this function
void peek_bytes(CircularBuffer *cb, int n) {
    int idx = cb -> tail;
    int rem = (cb -> count >= n) ? n : cb -> count;
    while (n > 0) {
        if (rem > 0) {
            printf("%d", cb -> buffer[idx]);
            if (rem > 1) printf(" ");
        } else {
            printf("%s", " NULL");
        }
        idx = (idx + 1) % 10;
        rem--;
        n--;
    }
}

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);

    peek_bytes(&cb, n);

    return 0;
}