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 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"}
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