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Top: Basic types: string: Operators #include <ptypes.h> // assignment string& string::operator= (const char* sc); string& string::operator= (char c); string& string::operator= (const string& s); void assign(string& s, const char* buf, int len); // concatenation string& string::operator+= (const char* sc); string& string::operator+= (char c); string& string::operator+= (const string& s); string string::operator+ (const char* sc) const; string string::operator+ (char c) const; string string::operator+ (const string& s) const; friend string operator+ (const char* sc, const string& s); friend string operator+ (char c, const string& s); // comparison bool string::operator== (const char* sc) const; bool string::operator== (char) const; bool string::operator== (const string&) const; bool string::operator!= (const char* sc) const; bool string::operator!= (char c) const; bool string::operator!= (const string& s) const; // indexed character access, 0-based char& string::operator[] (int I); The string class defines the following binary operators: assignment (=), concatenation (+), concatenation with assignment (+=) and comparison (==, !=). At least one of the operands (either left or right) must be of type string. Another operand can be one of the following: char, char* or string. Indexed access operator allows to store or retrieve a value of an individual character. The index is 0-based. When compiled with either DEBUG or _DEBUG conditional symbol, bounds checking is performed for the indexed access; if the index is out of bounds (i.e. less than 0 or equals to or greater than the length of the string), an unrecoverable error is raised. The non-debugging version of the library never checks for index overlfows, thus making your program somewhat faster but less safe. Examples string s1 = "abc", s2 = 'd', s3; s3 = s1 + s2; s2 += "ef"; s3[2] = 'B'; See also: Constructors/destructors, Typecasts, Manipulation PTypes home |