【c语言】用C语言设计一个环形缓冲区。当环形缓冲区有一半占用未处理时，提示使用了50%.

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#include <stdio.h>
#include <stdlib.h>

#define BUFFER_SIZE 10

int buffer[BUFFER_SIZE]; // 环形缓冲区数组
int readIndex = 0; // 缓冲区读取索引
int writeIndex = 0; // 缓冲区写入索引
int count = 0; // 缓冲区占用计数器

void enqueue(int data) {
    if (count == BUFFER_SIZE) { // 缓冲区已满
        printf("Buffer is full. Unable to enqueue %d.\n", data);
        return;
    }
    buffer[writeIndex] = data;
    writeIndex = (writeIndex + 1) % BUFFER_SIZE; // 环形
    count++;
    if (count == BUFFER_SIZE / 2) { // 缓冲区占用了一半
        printf("Buffer is 50%% occupied.\n");
    }
}

int dequeue() {
    if (count == 0) { // 缓冲区为空
        printf("Buffer is empty. Unable to dequeue.\n");
        return -1;
    }
    int data = buffer[readIndex];
    readIndex = (readIndex