86. Circular Buffer Read

#include <stdio.h>

typedef struct {
    int buffer[10];
    int head;
    int tail;
    int count;
    int capacity;
} CircularBuffer;


void read_bytes(CircularBuffer *cb, int n) {
 for(int i = 0; i < n; ++i){
    if(i > 0) printf(" ");
    if(cb->count == 0){
        printf("NULL");
    } else{
    printf("%d", cb->buffer[cb->tail]);
    cb->tail = (cb->tail + 1) % cb->capacity;
    --cb->count;
}
}
printf("\n");
printf("Tail: %d", cb->tail);
}   


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);
    read_bytes(&cb, n);

    return 0;
}