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
    int data;
    for(int i = 0; i<n; i++){
         if(i>0) printf(" "); //Test cases were failing because I was not adding space after last value
        if(cb->count > 0){ // if buffer is not empty, read the data
        data = cb->buffer[cb->tail];
        printf("%d", data);
        cb->tail = (cb->tail + 1) % cb -> capacity; //wrapping
        cb->count --; //count decreament
        }else{
            printf("NULL"); // if buffer is empty, print null
        }

    }
    printf("\nTail: %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