Doubt with usage of string::substr() function

[nishal]

If the length of the string is less than the length of the substring requested, what will happen to the substring?

[Disch]

You'll get up to the end of the string.

[Fransje]

See this page: http://www.cplusplus.com/reference/string/string/substr/

if the string is shorter, as many characters as possible are used