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(cb->count>0){

            printf("%i",cb->buffer[cb->tail]);
            cb->tail=(cb->tail+1)%cb->capacity;
            cb->count--;
            
        }else{

            printf("NULL",cb->buffer[cb->tail]);

        }if(i<(n-1)){

            printf(" ");

        }
    }

    printf("\nTail: %i", 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