To Display output like c=5 in qt creator within same line edit.

[nawaz]

i want to display output line c=5 in sam line edit. but m only getting 5 .

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect(ui->pushButton, SIGNAL(clicked()),this,SLOT(result()));
}
 
void MainWindow::result()
{
int a=2;
int b=3 ;
int c= a+b;
QString s="";
ui->lineEdit->setText("c=");
ui->lineEdit->setText(s.setNum(c));
 
 
}
 
MainWindow::~MainWindow()
{
    delete ui;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect(ui->pushButton, SIGNAL(clicked()),this,SLOT(result()));
}

void MainWindow::result()
{
int a=2;
int b=3 ;
int c= a+b;
QString s="";
ui->lineEdit->setText("c=");
ui->lineEdit->setText(s.setNum(c));


}

MainWindow::~MainWindow()
{
    delete ui;
}

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[Zlatomir]

Look at arg() member function in QString and it's overloads, and construct a QString with what you need and set that to display in the label (or lineEdit).

[d_stranz]

Every time you call setText(), it completely replaces the current text in the line edit. So your second call to setText() erases the "c=" and replaces it with "5". What Zlatomir is telling you is to look at the QString::arg() methods, and use them to build a QString that contains both "c=" and the result of the calculation, then call setText() once with that formatted string.