Circular Buffer Read

Code

#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>=cb->count){
                 printf("NULL");
                 }
            else{
             printf("%d",cb->buffer[cb->tail]);
             
             cb->tail=(cb->tail+1)%cb->capacity;}
               if (i < n - 1) {
                 printf(" ");
        }
    }
    putchar('\n');   
    printf("Tail: %d\n",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;
}

Solving Approach