KURL url("https://www.example.com/path/file.txt"); url.setHost("www.somewhereelse.com"); cout << url.prettyURL(); // Output: https://www.somewhereelse.com/path/file.txt
KURL url; url.setProtocol("ftp"); url.setHost("ftp.example.com"); cout << url.prettyURL(); // Output: ftp://ftp.example.comIn this example, we create an empty KURL object and use the setProtocol and setHost functions to set the protocol and host respectively. Then, we print the URL using the prettyURL function. Overall, KURL setHost is a useful function for modifying URLs in a C++ application that uses the KIO library from KDE.