在自定義類型中實現assign函數，可以按照以下步驟進行：
class CustomType {
public:
void assign(const CustomType& other);
// other class members
};
void CustomType::assign(const CustomType& other) {
// Assign data members from other object to current object
// Example:
this->dataMember1 = other.dataMember1;
this->dataMember2 = other.dataMember2;
// Assign other data members as needed
}
CustomType obj1;
CustomType obj2;
// Assign obj2 data members to obj1
obj1.assign(obj2);
通過實現assign函數，可以方便地將一個對象的數據成員賦值給另一個對象，從而實現自定義類型的賦值操作。
