串行 COM 编程：随机数

Question

我的编码需要一些帮助。如果我们要编写一个字符串并通过 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 发送它会怎样端口.. 我实际上必须在 "this->serialPort1->WriteLine(message);" 中更改什么？尝试了 google 中的几个代码。其中 none 个有效

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

Serial COM Programming : Random Numbers

c++

visual-studio-2010

serial-port

serial-communication