Qt输出到控制台/接收程序输出

输出到控制台：

#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();

}

接收程序输出：

#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() 启动一个进程，然后等待该进程结束。

//QProcess::startDetached() 启动一个进程，然后使其和当前进程脱离进程的父子关系。

pro->waitForStarted();

//server端接收数据

void MainWindow::readoutput()

{

if( !pro) return;

QString temp = pro->readAll();

ui->label->setText(temp);

}