31 lines
625 B
C++
31 lines
625 B
C++
//String.cc
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#include "String.hh"
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String operator+( const String& lhs, const String& rhs ) {
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String result(lhs); // Copy lhs into res with constructor
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result += rhs ; // Use operator+= function which is a member of the class
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return result ;
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}
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String& String::operator=( const String& a ) {
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if ( &a != this ) {
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insert(a._s) ;
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}
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return *this ;
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}
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String& String::operator+=( const String& a ) {
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int newlen = _len + a._len ;
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char * newstr = new char[ newlen+1 ] ;
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strcpy(newstr, _s) ;
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strcpy(newstr + _len, a._s) ;
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if (_s) delete[] _s ;
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_s = newstr ;
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_len = newlen ;
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return *this ;
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}
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