Question

I have the following code where I try to insert randomValue into an URL.

int randomValue = qrand() % 100;
view = new QWebView(this) ;

view->load(QUrl("http://blogsearch.google.com/blogsearch?q=C&start="+randomValue+"&num=1&output=rss"));

The following error is reported:

error: invalid operands of types ‘const char*’ and ‘const char [18]’ to binary ‘operator+’

So, I want to append the randomValue into the URL. How do I do it?

Answer 1

Use QString for this. It is far more capable than std::string and it provides what you need directly.

QString baseurl("http://blogsearch.google.com/blogsearch?q=C&num=1&output=rss&start=%1");
view->load(QUrl(baseurl.arg(randomValue)));

See QString documentation for more details.