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POerror while comparing a QString
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  1. POerror while comparing a QString
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    copied!<p>im trying to write a simple loggin form in Qt . its supposed to open another form if the username and password are right . but its acting really weird heres my code :</p> <pre><code>login::login(QWidget *parent) : QDialog(parent) { QPushButton * login_button = new QPushButton; QPushButton * exit = new QPushButton; login_button-&gt;setText("LOGIN"); exit-&gt;setText("EXIT"); QLineEdit * username = new QLineEdit; QLineEdit * password = new QLineEdit; QVBoxLayout * login_layout = new QVBoxLayout ; QHBoxLayout * button_layout = new QHBoxLayout ; username-&gt;setText("Enter Username ..."); password-&gt;setText("Enter Password ... "); exit-&gt;connect(exit,SIGNAL(pressed()),this , SLOT(close())); login_layout-&gt;addWidget(username); login_layout-&gt;addWidget(password); button_layout-&gt;addWidget(login_button); button_layout-&gt;addWidget(exit); login_layout-&gt;addLayout(button_layout); this-&gt;setLayout(login_layout); this-&gt;connect(login_button,SIGNAL(clicked()),this,SLOT(finduser())); } void login::finduser() { if (username-&gt;text().compare("admin")) // &lt;---- problem !! emit showmanage() ; return; } </code></pre> <p>finduser is a SLOT for my dialog class . it emits the "showmanage" signal which opens the form im willing to open . the actual problem is in the if statement . i have no idea why but when it runs it causes my windows to crash . this also doesnt work :</p> <pre><code>void login::finduser() { if (username-&gt;text()=="admin") // &lt;---- problem !! emit showmanage() ; return; } </code></pre> <p>i have no idea what im doing wrong also heres the debug message : the inferior stopped because it recievd a signal from operating system signal name : sigsegv signal meaning : segmentation fault</p>
 

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