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Strings (Substrings)

• The substr(start, length) member function is used to extract substrings.

  string greeting = "Hello, World!\n";
  string sub = greeting.substr(0,4);
  /* sub is "Hell" */
  

• The position numbers in a string start at 0. The last character is always one less than the length of the string.

  H	e	l	l	o	,		W	o	r	l	d	!	\n
  0	1	2	3	4	5	6	7	8	9	10	11	12	13

• string w = greeting.substr(7, 5);

  H	e	l	l	o	,		W	o	r	l	d	!	\n
  0	1	2	3	4	5	6	7	8	9	10	11	12	13

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