How to empty a string?

How do I empty a string to obtain an empty line whe I "cout" it?

Do you mean you want to write a blank line to the screen? Try:
cout <<endl;

hehe ;) - sorry, but that's not the problem.

The string is returned by a function an only in certain cases it must be empty...
so I need to return an EMPTY string:

Code:

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cout << string << endl;

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needs to give me the spare line.

Well if it's a std::string, I suppose:
std::string * s = new string(" ");

For a char array, do:

strcpy(s, " ");

You can use

Quote:

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return "";

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in case where an empty std::string is to be returned.

@ Sebastiani: that's it - thank you :)

Functions clear() and erase() in the string class as well as over assignment operators do not assume that you want to clear everything from a string when you use one of the functions or the operator. From an STL string class perspective, a string object can hold more than just characters.

One solution is to set the string object array to NULL and then call clear().

Code:

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string sText;

// Get a line of data from cin buffer.
// getline() terminates on ENTER key.
std::getline(cin, sText);

// Clear the entire object.
sText[sText.size()] = NULL;
sText.clear();

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Kuphryn