查找数组中出现频率最高的值(C)

def find_most_frequent_value(arr):
    freq_dict = {}
    max_freq = 0
    most_frequent_values = []

    # 计算每个元素的出现次数
    for num in arr:
        if num in freq_dict:
            freq_dict[num] += 1
        else:
            freq_dict[num] = 1

        # 更新最大频率
        if freq_dict[num] > max_freq:
            max_freq = freq_dict[num]

    # 找到出现频率最高的值
    for num, freq in freq_dict.items():
        if freq == max_freq:
            most_frequent_values.append(num)

    return most_frequent_values

# 示例用法
arr = [1, 2, 3, 2, 4, 1, 5, 2, 2]
result = find_most_frequent_value(arr)
print("出现频率最高的值：", result)