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) {
    // Your logic here
    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) % 10;
            (*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;
}

Solving Approach