通过消息队列实现进程之间通信

#include 
#include 
#include 
#include 
#include 
#include 

// 定义消息结构体
struct message {
    long message_type;
    char message_text[100];
};

int main() {
    key_t key;
    int message_id;

    // 生成key
    key = ftok("progfile", 65);

    // 创建消息队列
    message_id = msgget(key, 0666 | IPC_CREAT);

    // 发送消息
    struct message data;
    data.message_type = 1;
    strcpy(data.message_text, "this is a message from process 1");
    msgsnd(message_id, &data, sizeof(data), 0);

    // 接收消息
    struct message received_data;
    msgrcv(message_id, &received_data, sizeof(received_data), 1, 0);
    printf("Data received from process 2: %s\n", received_data.message_text);

    // 销毁消息队列
    msgctl(message_id, IPC_RMID, NULL);

    return 0;
}