在C中将不同大小的整数与字节数组相互转换的跨操作系统方法是什么？

#include <stdio.h>

// 将整数转换为字节数组
void serialize(int num, unsigned char* buffer) {
    buffer[0] = (num >> 24) & 0xFF;
    buffer[1] = (num >> 16) & 0xFF;
    buffer[2] = (num >> 8) & 0xFF;
    buffer[3] = num & 0xFF;
}

// 将字节数组转换为整数
int deserialize(const unsigned char* buffer) {
    int num = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
    return num;
}

int main() {
    int num = 123456789;
    unsigned char buffer[4];

    // 序列化
    serialize(num, buffer);

    // 打印字节数组
    printf("Serialized data: ");
    for (int i = 0; i < 4; i++) {
        printf("%02X ", buffer[i]);
    }
    printf("\n");

    // 反序列化
    int deserializedNum = deserialize(buffer);

    // 打印反序列化结果
    printf("Deserialized data: %d\n", deserializedNum);

    return 0;
}