Peek N Bytes from Circular Buffer

Code

#include <stdio.h>
typedef struct {
    int buffer[10];
    int head;
    int tail;
    int count;
    int capacity;
} CircularBuffer;
void peek_bytes(CircularBuffer *cb, int n) {
    for (int i=0;i<n;i++){
        if (i>=cb->count) printf("NULL");
        else {
            printf("%d",cb->buffer[cb->tail]);
            cb->tail=(cb->tail+1)%cb->capacity; 
        }
        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;
}

Solving Approach