substr [C++ Reference]
Keywords: string,substr
Date: 2009-10-08T22:09:18-0700

[[substr]]
C++ Reference
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## substr

Syntax:

        #include <string>
        string substr( size_type index, size_type length = npos ) const;

The substr() method returns a substring of the current string, starting at index, and length characters long.

If index + length is past the end of the string, then only the remainder of the string starting at index will be returned.

If length is omitted, it will default to string::npos, and the substr() function will simply return the remainder of the string starting at index.

For example:

         string s("What we have here is a failure to communicate");
         string sub = s.substr(21);
         cout << "The original string is " << s << endl;
         cout << "The substring is " << sub << endl;

displays

         The original string is What we have here is a failure to communicate
         The substring is a failure to communicate

Related Topics: copy

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