C++ DO loop being strange

Question

First of all, here is my code:

string text;
do {
   cout << "Enter text: ";
   ws(cin);
   getline(cin, text);
} while (!text.empty());
// do stuff

What I want my code to do ?
- Check if the user input is empty ;
if the userinput = empty, loop to the beginning and he has to enter new text.
If userinput != empty, get out of the loop and continue the program.

What is my code doing ?
- When I enter a text, the loop start from the beginning and I have to retype a text.
- When I do not enter anything and just type enter, my program is indefinitely waiting and I need to Ctrl+C to exit.

Answer 1

It's not a repeat-until, but a do-while loop, use:

string text;
do {
   cout << "Enter text: ";
   ws(cin);
   getline(cin, text);
} while (text.empty());
//      ^^

Basically if the condition is true then it loops again, otherwise it breaks the loop. In your case it's looping if the string is not empty, and breaking the loop if the string is empty.