聊聊Java的引用类型(强引用、软引用、弱引用、虚引用),示例WeakHashMap的使用【享学Java】...
strncpy(this->data, str.data, str.length+1); } } String::String (const char *str) { if (str==NULL) { this->data=NULL; this->length=0; } else { this->length = strlen(str); this->data = new char [strlen(str)+1]; strncpy(this->data, str, this->length+1); } } 我在N...