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