Peek N Bytes from Circular Buffer

Code

#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
    int len = 0;
    int tail = cb->tail;
    if (cb->count >= n) {
        len = n;
    }
    else {
        len = cb->count;
    }
    for(int i=0;i < len; i++) {
        if (i != 0) {
            printf(" ");
        }
        printf("%d", cb->buffer[tail]);
        tail = (tail + 1) % cb->capacity;
    }
    if (cb->count >= n) {
        return;
    }
    for(int i =0; i < (n - len); i++) {
        printf(" NULL");
    }
}

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;
}

Solving Approach