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Tip of the Day
Language: C++
Expertise: All
Apr 7, 1999

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Various Forms of Initializing std::string

Class std::string can be initialized in five forms: by a C-string, by part of a C-string, by another string object, by a sequence of characters, or by part of another string object. For example:
 
#include <string>
using namespace std;
void f()
{
  const char text[] = "hello world";
  string s1 = text;  // initialization of string object with a C-style string
  string s2(s1);  // initialize with another string object
  string s3(&text[0], &text[5]);   // initialize by part of a C-string
  string s4(10, 0); // by a sequence of 10 characters
  string s5 ( s2.begin(), s2.find(' ')); //  by part of another string object; s5 = "hello"
}
Danny Kalev
 
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