Program Crash HOW TO get user input and convert to hexadecimal

[franz]

What kind of input do you expect? Do you wish to convert each character to it's number representation or do you wish to read a number and display that in hexadecimal format?

I'm pretty sure your code doesn't do what you want it to.

QString hex[6]=NULL;

QString hex[6]=NULL;

To copy to clipboard, switch view to plain text mode 

This is an array of 6 QStrings. You can't initialize it to NULL.