Quote Originally Posted by sonulohani View Post
Qt Code: 
  1. void MainWindow::on_pushButton_clicked(){
  2.     int x,salary;
  3.     x=ui->lineEdit->text().toInt(0);
  4.     if(x<=5000){
  5.         salary=x;
  6.         QMessageBox::information(this,"Salary",QString::number(salary));
  7.     }
  8.     else if(x>=7000){
  9.         salary=x-5000;
  10.         salary=(salary*5)/100;
  11.         salary=x-salary;
  12.         QMessageBox::information(this,"Salary",QString::number(salary));
  13.     }
  14.     else if(x>=10000){
  15.         salary=x-(x*10/100);
  16.         QMessageBox::information(this,"Salary",QString::number(salary));
  17.     }
  18.     else if(x<10000 && x<20000){
  19.         salary=x-10000;
  20.         salary=salary*10/100;
  21.         salary=salary+250;
  22.         salary=x-salary;
  23.         QMessageBox::information(this,"Salary",QString::number(salary));
  24.     }
  25. }
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This is what i understood from your example. If you want any further help then you're welcome.
Thank you so much for your help . I finished the application and its working perfectly.
Qt Code: 
  1. void MainWindow::on_pushButton_clicked()
  2. {
  3.     int x,salary ;
  4.     x=ui->lineEdit->text().toLong(0);
  5.     if (x<=5000)
  6.     {
  7.         salary=x ;
  8.         QMessageBox::information(this,"salary",QString::number(salary));
  9.  
  10.     }
  11.     else if (x>5000 && x<=10000)
  12.     {
  13.         salary=x-5000;
  14.         salary=(salary*5)/100 ;
  15.         salary=x-salary ;
  16.         QMessageBox::information(this,"salary",QString::number(salary));
  17.     }
  18.     else if (x>10000){
  19.         salary=x-10000;
  20.     salary= (salary*10)/100 ;
  21.     salary=salary+250 ;
  22.     salary=x-salary;
  23.     QMessageBox::information(this,"salary",QString::number(salary));
  24.  
  25. }
  26. }
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