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