This question already has answers here:
Closed 2 years ago.
“printf” doesn't print a string immediatly [duplicate]
(2个答案)
下面是一些简单的代码;请注意,在调用printf之前有一个waitFor()语句。为什么程序会暂停3秒钟然后打印消息?
int main(int argc, char* argv)
{
    producer();

    return 0;
}

void waitFor(unsigned int secs) {
    unsigned int retTime = time(0) + secs;   // Get finishing time.
    while (time(0) < retTime);               // Loop until it arrives.
}

static void *producer()
{
    int s = 3;
    printf("Busy for %d seconds", s);
    waitFor(s);
    return NULL;
}

最佳答案

你是怎么运行这个程序的?有时Prtff()的输出被缓冲,只在打印大量数据或程序退出时才出现。有两种简单的修复方法:
使用stderr:printf(>fprintf(stderr,
使用后刷新:printf后调用fflush(stdout)

关于c - Printf没有按程序顺序执行,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/40712128/

10-11 22:10
查看更多