C++ ??? ???? ???? ???? ??? ??? ????? ??

???? ???? ?? ??? ?? ??? ?? ? ??? ??? ??????. ????? ?? ??? ?? ??, ?? ?? ?? ? ??? ???? ??? ??? ????. ???? ???? ?? ????? ??? ??? ??? ??????? ?? ??? ?????. ? ????? C++ ??? ???? ???? ???? ??? ??? ????? ??? ???? ?? ??? ?? ?? ?????.

1. ??? ?? ???? ?? C++? ?????

???? ?????? ??? ??? ?? ?????. C++? ?? ?? ?? ?? ??? ????? ??? ??? ?? ?? ?? ?? ?? ???? ? ??? ??? ????? ? ?? ??? ??? ?????. ????? ??? ?? ?? ?? ?? ?????.

?? ?? ??? ?? ???? ?? ???? ?????. ??? ???? ? ? ??? ?? ??? ?? ? ?? ?? ????. ?? ?? ??? ??? ?? ? ?? ??? ??? ??? ??? ???? ????? ? ??? ???.

#include <iostream>
#include <vector>

class Object {
public:
    Object() {
        // 對(duì)象初始化操作
    }
    ~Object() {
        // 對(duì)象銷毀操作
    }
};

class ObjectPool {
private:
    std::vector<Object*> pool;
public:
    Object* getObject() {
        if (pool.empty()) {
            return new Object;
        } else {
            Object* obj = pool.back();
            pool.pop_back();
            return obj;
        }
    }
    void returnObject(Object* object) {
        pool.push_back(object);
    }
};

int main() {
    ObjectPool objPool;
    Object* obj = objPool.getObject();
    // 使用對(duì)象...
    objPool.returnObject(obj);
    return 0;
}

2. ?? ?? ???? ?? C++? ?????

???? ????? ?? ??? ??? ??? ?????. C++? ?? ??? ???? CPU ?? ??? ???, ??? ??? ???? ?? ??? ???? ??? ??? ?? ??? ??? ? ?? ??? ?????. ??? ??? ??? ???? ?? ??? ???? ??????.

#include <iostream>
#include <ctime>

void task() {
    // 執(zhí)行任務(wù)的代碼...
}

int main() {
    const unsigned int INTERVAL_MS = 1000;   // 任務(wù)執(zhí)行間隔時(shí)間，單位為毫秒
    std::clock_t start = std::clock();
    while (true) {
        std::clock_t now = std::clock();
        double elapsed_ms = (now - start) / (double) (CLOCKS_PER_SEC / 1000);   // 計(jì)算已經(jīng)過(guò)去的時(shí)間，單位為毫秒
        if (elapsed_ms >= INTERVAL_MS) {
            start = now;
            task();
        } else {
            // 等待剩余時(shí)間
            unsigned int remaining_ms = INTERVAL_MS - elapsed_ms;
            sleep(remaining_ms);
        }
    }
    return 0;
}

3. ??? ???? ?? C++? ?????

???? ???? ???? ?? ?? ?????. C++? ??? ? ???? ??? ?? ??? ?? ???? ??? ??? ????? ? ?? ??? ?????. ??? ???? ???? ?? ??? ????? ????.

#include <iostream>
#include <ctime>
#include <signal.h>

void task() {
    // 執(zhí)行任務(wù)的代碼...
}

void timer_handler(int sig) {
    task();
}

int main() {
    const unsigned int INTERVAL_SEC = 1;   // 任務(wù)執(zhí)行間隔時(shí)間，單位為秒
    struct sigaction sa;
    struct itimerval timer;

    memset(&sa, 0, sizeof(sa));
    sa.sa_handler = &timer_handler;
    sigaction(SIGALRM, &sa, NULL);

    timer.it_value.tv_sec = INTERVAL_SEC;
    timer.it_value.tv_usec = 0;
    timer.it_interval.tv_sec = INTERVAL_SEC;
    timer.it_interval.tv_usec = 0;
    setitimer(ITIMER_REAL, &timer, NULL);

    while (true) {
        // 等待任務(wù)的觸發(fā)
        sleep(1);
    }
    return 0;
}

??:

? ???? C++ ??? ???? ?? ??? ?? ???, ?? ?? ?? ???, ??? ??? ? ???? ???? ??? ??? ????? ??? ?????. C++ ??? ???? ??? ??? ????? ?????? ???? ???? ??, ??? ? ??? ??? ???? ? ????. ??? ?? ?? ??? ???? ??? ?? ?? ??? ?? ???? ???? ?? ??? ??? ??? ???? ???? ???.

? ??? C++ ??? ???? ???? ???? ??? ??? ????? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!