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) {
    // Your code here
    if (!cb) return;

    while (cb->count-- > 0 && n-- > 0) {
        if (cb->tail >= cb->capacity) cb->tail = 0;
        printf("%d", cb->buffer[cb->tail++]);
        if (n >= 1) printf(" ");
    }

    while (n-- > 0) {
        printf("NULL");
        if (n >= 1) 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);

    peek_bytes(&cb, n);

    return 0;
}