Question

我需要对我的编码提供一点帮助..如果我们要写一个字符串并通过一个com端口发送，请参阅下面的编码。如果我们要生成随机字符串并通过com端口发送它，该怎么办？我在“this-＆gt; serialPort1-＆gt; WriteLine（message）;”中实际需要改变什么？“ ？尝试了谷歌的几个代码..它们都没有工作

private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e) {

            //add sender name
             String^ name = this->serialPort1->PortName;

             // grab text and store in send buffer
             String^ message = this->textBox2->Text;

             // write to serial
             if(this->serialPort1->IsOpen)

            //this->_serialPort->WriteLine(String::Format("<{0}>: {1}",name,message));
                this->serialPort1->WriteLine(message);
             else
                this->textBox2->Text="Port Not Opened";


     }

Answer 1

//Sorry for the bad format. Must learn how to use it correctly.
void createRandom(std::string & randString, const int len)
{

    static const std::string theCharacters =  "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    for (int i = 0; i < len; ++i) 
    {
        //generate a random number which not bigger that max size of the available characters, then add it to the string.
        randString += theCharacters[rand() % (sizeof(theCharacters) - 1)];
    }
}
createRandom(message);
this->serialPort1->WriteLine(message);

串行COM编程：随机数

1 个答案: