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106:
107: //non constant offset operator, returns
108: // reference to character so it can be changed
109: char & String::operator[](int offset)
110: {
111: if (offset > itsLen)
112: return itsString[itsLen-1];
113: else
114: return itsString[offset];
115: }
116:
117: // constant offset operator for use
118: // on const objects (see copy constructor!)
119: char String::operator[](int offset) const
120: {
121: if (offset > itsLen)
122: return itsString[itsLen-1];
123: else
124: return itsString[offset];
125: }
126:
127: // creates a new string by adding current
128: // string to rhs
129: String String::operator+(const String& rhs)
130: {
131: int totalLen = itsLen + rhs.GetLen();
132: String temp(totalLen);
133: int i,j;
134: for (i = 0; i<itsLen; i++)
135: temp[i] = itsString[i];
136: for (j = 0; j<rhs.GetLen(); j++, i++)
137: temp[i] = rhs[j];
138: temp[totalLen]=\0;
139: return temp;
140: }
141:
142: // changes current string, returns nothing
143: void String::operator+=(const String& rhs)
144: {
145: int rhsLen = rhs.GetLen();
146: int totalLen = itsLen + rhsLen;
147: String temp(totalLen);
148: int i,j;
149: for ( i = 0; i<itsLen; i++)
150: temp[i] = itsString[i];
151: for ( j = 0; j<rhs.GetLen(); j++, i++)
152: temp[i] = rhs[i-itsLen];
153: temp[totalLen]=\0;
154: *this = temp; |
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continues |
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