Qt輸出到控制檯/接收程序輸出

輸出到控制檯：

#include <iostream>

#include <stdio.h>

void MainWindow::writeTo()

{

QFile fileout;

fileout.open(stdout, QIODevice::WriteOnly);

fileout.write(ui->lineEdit->text().toLatin1().constData(), ui->lineEdit->text().length()); // write to std

fileout.close();

}

接收程序輸出：

#include <QProcess>

private:

    QProcess *pro;

private slots:

    void readoutput();

    pro = new QProcess(this);

 //   connect(pro, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(processFinished(int, QProcess::ExitStatus)));

 //   connect(pro, SIGNAL(error(QProcess::ProcessError)), this, SLOT(processError(QProcess::ProcessError)));

    connect(pro, SIGNAL(readyRead()), this, SLOT(readoutput()));

    pro->start("./QProcess_client.exe");

    //QProcess::execute() 啓動一個進程，然後等待該進程結束。

    //QProcess::startDetached() 啓動一個進程，然後使其和當前進程脫離進程的父子關係。

    pro->waitForStarted();

//server端接收數據

void MainWindow::readoutput()

{

if( !pro) return;

QString temp = pro->readAll();

ui->label->setText(temp);

}