c++ - 减慢for循环的速度

Question

for(;;) {
    int rand_number = rand() % 2;
    cout << rand_number;
}

这些循环会像矩阵电影 (LOL) 一样在屏幕上生成 1 和 0，但代码执行速度非常快，有什么方法可以让数字显示缓慢吗？

Answer 1

例如用于Sleep(3000);等待 3000 毫秒

#include <iostream>
#include <stdlib.h>
#include <Windows.h>

using namespace std;

int main(int argc,char**argv){
    cout<<"a"<<endl;
    Sleep(3000);
    cout<<"b"<<endl;

    return 0;
}

Answer 2

退房usleep。你也可以使用 sleep ，但我想那会太慢。

USLEEP(3)                BSD Library Functions Manual                USLEEP(3)

NAME
     usleep -- suspend thread execution for an interval measured in microseconds

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     usleep(useconds_t useconds);

DESCRIPTION
     The usleep() function suspends execution of the calling thread until either useconds microseconds have elapsed or a signal is delivered to the thread whose action
     is to invoke a signal-catching function or to terminate the thread or process.  The actual time slept may be longer, due to system latencies and possible limita-
     tions in the timer resolution of the hardware.

     This function is implemented, using nanosleep(2), by pausing for useconds microseconds or until a signal occurs.  Consequently, in this implementation, sleeping
     has no effect on the state of process timers and there is no special handling for SIGALRM.

RETURN VALUES
     The usleep() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS
     The usleep() function will fail if:

     [EINTR]            A signal was delivered to the process and its action was to invoke a signal-catching function.

SEE ALSO
     nanosleep(2), sleep(3)

HISTORY
     The usleep() function appeared in 4.3BSD.

BSD                            February 13, 1998                           BSD

Answer 3

如果你只是想让它在你准备好之前停止，你可以输入一个随机的无意义的 cin。它只会在那里等待输入，直到您按回车键。