您能否在不使用 GetAsyncKeyState 或线程的情况下为 Windows 程序运行 C++ 中的函数的同时获取用户输入? [英] Can you simultaneously get user input while also running a function in C++ for a windows program without using GetAsyncKeyState or threading?

问题描述

我有一个项目，我正在使用 Dev-C++ 作为 IDE，使用 Windows 作为操作系统.由于项目因大小限制和当前知识而在复杂性上受到限制，我宁愿避免使用 GetAsyncKeyState 和线程，除非我可以使用一种相当简单(少于 10 行)的方法.

我的程序当前使用 Text 函数使用字符串显示文本并将它们输出到控制台窗口.我想实现一个功能，允许用户按下一个键，并允许在不等待函数读取整个字符串的情况下打印出文本.

例如:

<块引用>

欢迎来到……"[用户在文本缓慢时按空格键逐个字符显示]

"欢迎收看我的节目！这是我开发的！"[整个字符串是显示]

代码:

void Text(字符串输入){整数 x = 0;for(int i = 0; i <= 3; i++)//根据字符串数量决定何时停止运行{while (input[x] != '\0'){if(input[x] == '.' || input[x] == '!'){cout<<输入[x];睡眠(375)；cout<<"";x++;}否则如果(输入 [x] == '*'){睡眠(375)；cout<<结束;x++;}否则如果(输入 [x] == '~'){睡眠(2000)；系统(CLS")；x++;}别的{cout<<输入[x];睡眠(75)；x++;}}}}

解决方案

不，您不能采用可移植的方式.原因是通常控制台上的标准 I/O 会等待一行完成，因此您无法在键入后立即捕获单个字符.

不过，您可以使用非标准函数来实现这一点！请参阅 无需等待即可从标准输入中捕获字符按下回车

I have a project that I am working on using Dev-C++ as the IDE and Windows as the operating system. As the project is restricted in complexity due to size constraints and current knowledge, I would prefer to avoid using GetAsyncKeyState and threading unless there is a fairly simple (less than 10 lines) approach I could use.

My program currently displays text using the Text function using strings and outputting them to the console window. I want to implement a feature that would allow the user to press a key, and allow the text to print out without waiting for the function to read the entire string.

For example:

"Welcome to ..." [user presses space bar while the text is slowly being displayed character by character]

"Welcome to my program! This was developed by me!" [entire string is displayed]

Code:

void Text(string input)
{
    int x = 0;
    for(int i = 0; i <= 3; i++) //decides when to stop running based on number of strings
    {
        while (input[x] != '\0')
        {
            if(input[x] == '.' || input[x] == '!')
            {
                cout << input[x];
                Sleep(375);
                cout << " ";
                x++;
            }
            else if(input[x] == '*')
            {
                Sleep(375);
                cout << endl;
                x++;
            }
            else if(input[x] == '~')
            {
                Sleep(2000);
                system("CLS");
                x++;
            }
            else
            {
                cout << input[x];
                Sleep(75);
                x++;
            }
        }
    }
}

解决方案

No, you cannot in a portable way. The reason is that standard I/O on the usual consoles wait for a line to be completed, so you cannot capture single characters as soon as they are typed.

You can achieve that with non-standard functions, though! See Capture characters from standard input without waiting for enter to be pressed

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